Common Weakness Enumeration

CWE-79

Allowed

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Abstraction: Base · Status: Stable

API response cwe.mitre.org

The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

26543 vulnerabilities reference this CWE, most recent first.

CVE-2026-105607 (GCVE-0-2026-105607)

Vulnerability from cvelistv5 – Published: 2026-11-05 17:51 – Updated: 2026-11-06 04:34
VLAI
Title
Joomla Extension - balbooa.com - Unauthenticated stored XSS in the "Recent Comments / Recent Reviews" widget in Gridbox < 2.20.5.0
Summary
Joomla Extension - balbooa.com - Unauthenticated stored XSS in the "Recent Comments / Recent Reviews" widget in Gridbox < 2.20.5.0
Severity
8.6 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
8.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 19:57 UTC
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
Joomla CNA
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2026-105602 (GCVE-0-2026-105602)

Vulnerability from cvelistv5 – Published: 2026-11-02 13:19 – Updated: 2026-11-02 18:52
VLAI
Title
Joomla Extension - joomshaper.com - Stored Cross-Site Scripting (XSS) in Mega Menu Badge Text in Helix Ultimate < 2.2.11.
Summary
Joomla Extension - joomshaper.com - Stored Cross-Site Scripting (XSS) in Mega Menu Badge Text in Helix Ultimate < 2.2.11.
Severity
8.6 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-02 16:52 UTC
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
Joomla CNA
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2026-105601 (GCVE-0-2026-105601)

Vulnerability from cvelistv5 – Published: 2026-11-02 13:20 – Updated: 2026-11-02 18:54
VLAI
Title
Joomla Extension - php-web-design.com - Reflected XSS in StageIt 1.0-5.7.5, 6.0-6.3.5
Summary
Joomla Extension - php-web-design.com - Reflected XSS in StageIt 1.0-5.7.5, 6.0-6.3.5
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-02 16:51 UTC
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
Joomla CNA
References
Impacted products
Vendor Product Version
php-web-design.com StageIt extension for Joomla Affected: 1.0-5.7.5
Affected: 6.0-6.3.5
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-105467 (GCVE-0-2026-105467)

Vulnerability from cvelistv5 – Published: 2026-11-08 16:49 – Updated: 2026-11-09 20:00
VLAI
Title
IBM QRadar SIEM is vulnerable to Open Redirect and Reflected XSS
Summary
IBM QRadar 7.5.0 through 7.5.0 Update Pack 16 Interim Fix 02, and 7.6.0.0 through 7.6.0.5 is vulnerable to Reflected XSS. A victim must open a specifically crafted URL while authenticated to QRadar to trigger this.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-09 20:00 UTC
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
ibm CNA
References
URL Tags
https://www.ibm.com/support/pages/node/7295450 vendor-advisorypatch
Impacted products
Vendor Product Version
IBM QRadar Affected: 7.5.0 , ≤ 7.5.0 Update Pack 16 Interim Fix 02 (semver)
Affected: 7.6.0.0 , ≤ 7.6.0.5 (semver)
    cpe:2.3:a:ibm:qradar_security_information_and_event_manager:7.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:qradar_security_information_and_event_manager:7.6.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:qradar_security_information_and_event_manager:7.6.0.5:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:qradar_security_information_and_event_manager:7.5.0:update_pack_16_interim_fix_02:*:*:*:*:*:*
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-105456 (GCVE-0-2026-105456)

Vulnerability from cvelistv5 – Published: 2026-10-30 15:22 – Updated: 2026-10-30 17:18 X_Open Source
VLAI
Title
Stored XSS via HTML scrubber rule in RTIR
Summary
RTIR extends RT's HTML scrubber to allow an internal link placeholder, and the extension lets through any link that merely contains the placeholder, including links using the executable javascript: scheme. The change applies to the whole RT instance once RTIR is installed, not only to RTIR's own queues. Anyone who can add HTML content to a ticket on such an instance can store such a link. That includes an unauthenticated sender of HTML email to the Incident Reports queue, which RTIR opens to everyone by default. Script runs when a user clicks the link, in that user's session, and can act in RT with that user's authority. This issue was fixed in version 5.0.11 and 6.0.4
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 17:05 UTC
CWE
  • CWE-79 - Improper neutralization of input during web page generation ('cross-site scripting')
Assigner
CERT-PL CNA
References
Impacted products
Vendor Product Version
Best Practical Solutions RT for Incident Response Affected: 5.0.0 , < 5.0.11 (semver)
Affected: 6.0.0 , < 6.0.4 (semver)
    cpe:2.3:a:best_practical_solutions:rt_for_incident_response:*:*:*:*:*:*:*:*
    cpe:2.3:a:best_practical_solutions:rt_for_incident_response:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Mateusz Szymaniec (CERT.PL)
Show details on NVD website
To clipboard 

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CVE-2026-105455 (GCVE-0-2026-105455)

Vulnerability from cvelistv5 – Published: 2026-10-30 15:34 – Updated: 2026-10-30 17:18 X_Open Source
VLAI
Title
Stored XSS via related ticket subject on RTIR Split and Create Incident forms
Summary
RTIR's ticket creation forms show the subject of the related ticket when splitting a ticket or creating an incident from a report, and they render that subject without HTML escaping. A ticket subject containing script runs it when a user opens either form. RTIR grants everyone the right to create Incident Reports by default, so an unauthenticated sender of an emailed report can set that subject. The script then runs in the session of the incident handler who creates an incident from the report or splits it, and can act in RT with that user's authority.  The issue was fixed in version 6.0.4. RTIR 5.0 is not affected.
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 17:05 UTC
CWE
  • CWE-79 - Improper neutralization of input during web page generation ('cross-site scripting')
Assigner
CERT-PL CNA
References
Impacted products
Vendor Product Version
Best Practical Solutions RT for Incident Response Affected: 6.0.0 , < 6.0.4 (semver)
    cpe:2.3:a:best_practical_solutions:rt_for_incident_response:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Mateusz Szymaniec (CERT.PL)
Show details on NVD website
To clipboard 

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CVE-2026-105454 (GCVE-0-2026-105454)

Vulnerability from cvelistv5 – Published: 2026-10-30 15:34 – Updated: 2026-10-30 17:18 X_Open Source
VLAI
Title
Stored XSS via crafted URLs in HTML ticket content in Request Tracker
Summary
RT's automatic link creation for URLs in HTML ticket content does not HTML-escape the URL it places in the link. A URL crafted to break out of the link's address can add a script that runs when the ticket history is displayed, with no further action by the viewer. Anyone who can add HTML content to a ticket can plant it. That includes an unauthenticated sender of HTML email to any queue that grants CreateTicket or ReplyToTicket to Everyone, which is routine for a queue that accepts mail from the public. The script runs in the session of any user who views the ticket, and can act in RT with that user's authority. This issue was fixed in version 5.0.11 and 6.0.4
Severity
5.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 17:05 UTC
CWE
  • CWE-79 - Improper neutralization of input during web page generation ('cross-site scripting')
Assigner
CERT-PL CNA
References
Impacted products
Vendor Product Version
Best Practical Solutions Request Tracker Affected: 5.0.0 , < 5.0.11 (semver)
Affected: 6.0.0 , < 6.0.4 (semver)
    cpe:2.3:a:best_practical_solutions:request_tracker:*:*:*:*:*:*:*:*
    cpe:2.3:a:best_practical_solutions:request_tracker:*:*:*:*:*:*:*:*
Create a notification for this product.
Credits
Mateusz Szymaniec (CERT.PL)
Show details on NVD website
To clipboard 

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CVE-2026-105410 (GCVE-0-2026-105410)

Vulnerability from cvelistv5 – Published: 2026-10-12 10:45 – Updated: 2026-10-16 16:41
VLAI
Title
Stored Cross-site Scripting (XSS) vulnerability affecting Tuleap Enterprise Edition from 17.0 through 17.5
Summary
A Stored Cross-site Scripting (XSS) vulnerability affecting Tuleap Enterprise Edition from 17.0 through 17.5 could allow an attacker to execute arbitrary script code in user's browser session.
Severity
8.7 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 16:40 UTC
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
3DS CNA
References
Impacted products
Vendor Product Version
Dassault Systèmes Tuleap Enterprise Edition Affected: 17.0-1 , ≤ 17.0-41 (custom)
Affected: 17.5-1 , ≤ 17.5-32 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-105409 (GCVE-0-2026-105409)

Vulnerability from cvelistv5 – Published: 2026-10-12 10:45 – Updated: 2026-10-15 18:06
VLAI
Title
Stored Cross-site Scripting (XSS) vulnerability affecting Tuleap Enterprise Edition from 17.0 through 17.5
Summary
A Stored Cross-site Scripting (XSS) vulnerability affecting Tuleap Enterprise Edition from 17.0 through 17.5 could allow an attacker to execute arbitrary script code in user's browser session.
Severity
8.7 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 17:57 UTC
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
3DS CNA
References
Impacted products
Vendor Product Version
Dassault Systèmes Tuleap Enterprise Edition Affected: 17.0-1 , ≤ 17.0-41 (custom)
Affected: 17.5-1 , ≤ 17.5-32 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2026-105408 (GCVE-0-2026-105408)

Vulnerability from cvelistv5 – Published: 2026-10-12 10:44 – Updated: 2026-10-15 18:07
VLAI
Title
Stored Cross-site Scripting (XSS) vulnerability affecting Tuleap Enterprise Edition from 17.0 through 17.5
Summary
A Stored Cross-site Scripting (XSS) vulnerability affecting Tuleap Enterprise Edition from 17.0 through 17.5 could allow an attacker to execute arbitrary script code in user's browser session.
Severity
8.7 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 17:57 UTC
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
3DS CNA
References
Impacted products
Vendor Product Version
Dassault Systèmes Tuleap Enterprise Edition Affected: 17.0-1 , ≤ 17.0-41 (custom)
Affected: 17.5-1 , ≤ 17.5-32 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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Mitigation MIT-4
Architecture and Design

Strategy: Libraries or Frameworks

  • Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid [REF-1482].
  • Examples of libraries and frameworks that make it easier to generate properly encoded output include Microsoft's Anti-XSS library, the OWASP ESAPI Encoding module, and Apache Wicket.
Mitigation
Implementation Architecture and Design
  • Understand the context in which your data will be used and the encoding that will be expected. This is especially important when transmitting data between different components, or when generating outputs that can contain multiple encodings at the same time, such as web pages or multi-part mail messages. Study all expected communication protocols and data representations to determine the required encoding strategies.
  • For any data that will be output to another web page, especially any data that was received from external inputs, use the appropriate encoding on all non-alphanumeric characters.
  • Parts of the same output document may require different encodings, which will vary depending on whether the output is in the:
  • etc. Note that HTML Entity Encoding is only appropriate for the HTML body.
  • Consult the XSS Prevention Cheat Sheet [REF-724] for more details on the types of encoding and escaping that are needed.
  • HTML body
  • Element attributes (such as src="XYZ")
  • URIs
  • JavaScript sections
  • Cascading Style Sheets and style property
Mitigation MIT-6
Architecture and Design Implementation

Strategy: Attack Surface Reduction

Understand all the potential areas where untrusted inputs can enter your software: parameters or arguments, cookies, anything read from the network, environment variables, reverse DNS lookups, query results, request headers, URL components, e-mail, files, filenames, databases, and any external systems that provide data to the application. Remember that such inputs may be obtained indirectly through API calls.

Mitigation MIT-15
Architecture and Design

For any security checks that are performed on the client side, ensure that these checks are duplicated on the server side, in order to avoid CWE-602. Attackers can bypass the client-side checks by modifying values after the checks have been performed, or by changing the client to remove the client-side checks entirely. Then, these modified values would be submitted to the server.

Mitigation MIT-27
Architecture and Design

Strategy: Parameterization

If available, use structured mechanisms that automatically enforce the separation between data and code. These mechanisms may be able to provide the relevant quoting, encoding, and validation automatically, instead of relying on the developer to provide this capability at every point where output is generated.

Mitigation MIT-30.1
Implementation

Strategy: Output Encoding

  • Use and specify an output encoding that can be handled by the downstream component that is reading the output. Common encodings include ISO-8859-1, UTF-7, and UTF-8. When an encoding is not specified, a downstream component may choose a different encoding, either by assuming a default encoding or automatically inferring which encoding is being used, which can be erroneous. When the encodings are inconsistent, the downstream component might treat some character or byte sequences as special, even if they are not special in the original encoding. Attackers might then be able to exploit this discrepancy and conduct injection attacks; they even might be able to bypass protection mechanisms that assume the original encoding is also being used by the downstream component.
  • The problem of inconsistent output encodings often arises in web pages. If an encoding is not specified in an HTTP header, web browsers often guess about which encoding is being used. This can open up the browser to subtle XSS attacks.
Mitigation MIT-43
Implementation

With Struts, write all data from form beans with the bean's filter attribute set to true.

Mitigation MIT-31
Implementation

Strategy: Attack Surface Reduction

To help mitigate XSS attacks against the user's session cookie, set the session cookie to be HttpOnly. In browsers that support the HttpOnly feature (such as more recent versions of Internet Explorer and Firefox), this attribute can prevent the user's session cookie from being accessible to malicious client-side scripts that use document.cookie. This is not a complete solution, since HttpOnly is not supported by all browsers. More importantly, XmlHttpRequest and other powerful browser technologies provide read access to HTTP headers, including the Set-Cookie header in which the HttpOnly flag is set.

Mitigation MIT-5
Implementation

Strategy: Input Validation

  • Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
  • When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
  • Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
  • When dynamically constructing web pages, use stringent allowlists that limit the character set based on the expected value of the parameter in the request. All input should be validated and cleansed, not just parameters that the user is supposed to specify, but all data in the request, including hidden fields, cookies, headers, the URL itself, and so forth. A common mistake that leads to continuing XSS vulnerabilities is to validate only fields that are expected to be redisplayed by the site. It is common to see data from the request that is reflected by the application server or the application that the development team did not anticipate. Also, a field that is not currently reflected may be used by a future developer. Therefore, validating ALL parts of the HTTP request is recommended.
  • Note that proper output encoding, escaping, and quoting is the most effective solution for preventing XSS, although input validation may provide some defense-in-depth. This is because it effectively limits what will appear in output. Input validation will not always prevent XSS, especially if you are required to support free-form text fields that could contain arbitrary characters. For example, in a chat application, the heart emoticon ("<3") would likely pass the validation step, since it is commonly used. However, it cannot be directly inserted into the web page because it contains the "<" character, which would need to be escaped or otherwise handled. In this case, stripping the "<" might reduce the risk of XSS, but it would produce incorrect behavior because the emoticon would not be recorded. This might seem to be a minor inconvenience, but it would be more important in a mathematical forum that wants to represent inequalities.
  • Even if you make a mistake in your validation (such as forgetting one out of 100 input fields), appropriate encoding is still likely to protect you from injection-based attacks. As long as it is not done in isolation, input validation is still a useful technique, since it may significantly reduce your attack surface, allow you to detect some attacks, and provide other security benefits that proper encoding does not address.
  • Ensure that you perform input validation at well-defined interfaces within the application. This will help protect the application even if a component is reused or moved elsewhere.
Mitigation MIT-21
Architecture and Design

Strategy: Enforcement by Conversion

When the set of acceptable objects, such as filenames or URLs, is limited or known, create a mapping from a set of fixed input values (such as numeric IDs) to the actual filenames or URLs, and reject all other inputs.

Mitigation MIT-29
Operation

Strategy: Firewall

Use an application firewall that can detect attacks against this weakness. It can be beneficial in cases in which the code cannot be fixed (because it is controlled by a third party), as an emergency prevention measure while more comprehensive software assurance measures are applied, or to provide defense in depth [REF-1481].

Mitigation MIT-16
Operation Implementation

Strategy: Environment Hardening

When using PHP, configure the application so that it does not use register_globals. During implementation, develop the application so that it does not rely on this feature, but be wary of implementing a register_globals emulation that is subject to weaknesses such as CWE-95, CWE-621, and similar issues.

CAPEC-209: XSS Using MIME Type Mismatch

An adversary creates a file with scripting content but where the specified MIME type of the file is such that scripting is not expected. The adversary tricks the victim into accessing a URL that responds with the script file. Some browsers will detect that the specified MIME type of the file does not match the actual type of its content and will automatically switch to using an interpreter for the real content type. If the browser does not invoke script filters before doing this, the adversary's script may run on the target unsanitized, possibly revealing the victim's cookies or executing arbitrary script in their browser.

CAPEC-588: DOM-Based XSS

This type of attack is a form of Cross-Site Scripting (XSS) where a malicious script is inserted into the client-side HTML being parsed by a web browser. Content served by a vulnerable web application includes script code used to manipulate the Document Object Model (DOM). This script code either does not properly validate input, or does not perform proper output encoding, thus creating an opportunity for an adversary to inject a malicious script launch a XSS attack. A key distinction between other XSS attacks and DOM-based attacks is that in other XSS attacks, the malicious script runs when the vulnerable web page is initially loaded, while a DOM-based attack executes sometime after the page loads. Another distinction of DOM-based attacks is that in some cases, the malicious script is never sent to the vulnerable web server at all. An attack like this is guaranteed to bypass any server-side filtering attempts to protect users.

CAPEC-591: Reflected XSS

This type of attack is a form of Cross-Site Scripting (XSS) where a malicious script is "reflected" off a vulnerable web application and then executed by a victim's browser. The process starts with an adversary delivering a malicious script to a victim and convincing the victim to send the script to the vulnerable web application.

CAPEC-592: Stored XSS

An adversary utilizes a form of Cross-site Scripting (XSS) where a malicious script is persistently "stored" within the data storage of a vulnerable web application as valid input.

CAPEC-63: Cross-Site Scripting (XSS)

An adversary embeds malicious scripts in content that will be served to web browsers. The goal of the attack is for the target software, the client-side browser, to execute the script with the users' privilege level. An attack of this type exploits a programs' vulnerabilities that are brought on by allowing remote hosts to execute code and scripts. Web browsers, for example, have some simple security controls in place, but if a remote attacker is allowed to execute scripts (through injecting them in to user-generated content like bulletin boards) then these controls may be bypassed. Further, these attacks are very difficult for an end user to detect.

CAPEC-85: AJAX Footprinting

This attack utilizes the frequent client-server roundtrips in Ajax conversation to scan a system. While Ajax does not open up new vulnerabilities per se, it does optimize them from an attacker point of view. A common first step for an attacker is to footprint the target environment to understand what attacks will work. Since footprinting relies on enumeration, the conversational pattern of rapid, multiple requests and responses that are typical in Ajax applications enable an attacker to look for many vulnerabilities, well-known ports, network locations and so on. The knowledge gained through Ajax fingerprinting can be used to support other attacks, such as XSS.

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