CVE-2025-54812 (GCVE-0-2025-54812)
Vulnerability from cvelistv5
Published
2025-08-22 18:46
Modified
2025-11-04 21:12
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-117 - Improper Output Neutralization for Logs
Summary
Improper Output Neutralization for Logs vulnerability in Apache Log4cxx.
When using HTMLLayout, logger names are not properly escaped when writing out to the HTML file.
If untrusted data is used to retrieve the name of a logger, an attacker could theoretically inject HTML or Javascript in order to hide information from logs or steal data from the user.
In order to activate this, the following sequence must occur:
* Log4cxx is configured to use HTMLLayout.
* Logger name comes from an untrusted string
* Logger with compromised name logs a message
* User opens the generated HTML log file in their browser, leading to potential XSS
Because logger names are generally constant strings, we assess the impact to users as LOW
This issue affects Apache Log4cxx: before 1.5.0.
Users are recommended to upgrade to version 1.5.0, which fixes the issue.
References
| URL | Tags | |
|---|---|---|
Impacted products
| Vendor | Product | Version | ||
|---|---|---|---|---|
| Apache Software Foundation | Apache Log4cxx |
Version: 0 ≤ |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2025-54812",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2025-08-22T19:07:34.778098Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2025-08-22T19:07:53.330Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
},
{
"providerMetadata": {
"dateUpdated": "2025-11-04T21:12:52.982Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00002.html"
},
{
"url": "http://www.openwall.com/lists/oss-security/2025/08/22/2"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Apache Log4cxx",
"vendor": "Apache Software Foundation",
"versions": [
{
"lessThan": "1.5.0",
"status": "affected",
"version": "0",
"versionType": "semver"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "sponsor",
"value": "Sovereign Tech Agency"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eImproper Output Neutralization for Logs vulnerability in Apache Log4cxx.\u003c/p\u003e\n\u003cp\u003eWhen using \u003ccode\u003eHTMLLayout\u003c/code\u003e, logger names are not properly escaped when writing out to the HTML file.\nIf untrusted data is used to retrieve the name of a logger, an attacker could theoretically inject HTML or Javascript in order to hide information from logs or steal data from the user.\nIn order to activate this, the following sequence must occur:\u003c/p\u003e\n\u003col\u003e\n\u003cli\u003eLog4cxx is configured to use \u003ccode\u003eHTMLLayout\u003c/code\u003e.\u003c/li\u003e\n\u003cli\u003eLogger name comes from an untrusted string\u003c/li\u003e\n\u003cli\u003eLogger with compromised name logs a message\u003c/li\u003e\n\u003cli\u003eUser opens the generated HTML log file in their browser, leading to potential XSS\u003c/li\u003e\n\u003c/ol\u003e\n\u003cp\u003eBecause logger names are generally constant strings, we assess the impact to users as LOW\u003c/p\u003e\n\u003cp\u003eThis issue affects Apache Log4cxx: before \u003ccode\u003e1.5.0\u003c/code\u003e.\u003c/p\u003e\n\u003cp\u003eUsers are recommended to upgrade to version \u003ccode\u003e1.5.0\u003c/code\u003e, which fixes the issue.\u003c/p\u003e"
}
],
"value": "Improper Output Neutralization for Logs vulnerability in Apache Log4cxx.\n\n\nWhen using HTMLLayout, logger names are not properly escaped when writing out to the HTML file.\nIf untrusted data is used to retrieve the name of a logger, an attacker could theoretically inject HTML or Javascript in order to hide information from logs or steal data from the user.\nIn order to activate this, the following sequence must occur:\n\n\n\n * Log4cxx is configured to use HTMLLayout.\n\n * Logger name comes from an untrusted string\n\n * Logger with compromised name logs a message\n\n * User opens the generated HTML log file in their browser, leading to potential XSS\n\n\nBecause logger names are generally constant strings, we assess the impact to users as LOW\n\n\nThis issue affects Apache Log4cxx: before 1.5.0.\n\n\nUsers are recommended to upgrade to version 1.5.0, which fixes the issue."
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "HIGH",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 2.1,
"baseSeverity": "LOW",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "LOW",
"subIntegrityImpact": "LOW",
"userInteraction": "ACTIVE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "LOW",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
},
{
"other": {
"content": {
"text": "low"
},
"type": "Textual description of severity"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-117",
"description": "CWE-117 Improper Output Neutralization for Logs",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2025-08-22T18:46:46.205Z",
"orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"shortName": "apache"
},
"references": [
{
"tags": [
"vendor-advisory"
],
"url": "https://logging.apache.org/security.html#CVE-2025-54812"
},
{
"tags": [
"patch"
],
"url": "https://github.com/apache/logging-log4cxx/pull/509"
},
{
"tags": [
"patch"
],
"url": "https://github.com/apache/logging-log4cxx/pull/514"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "Apache Log4cxx: Improper HTML escaping in HTMLLayout",
"x_generator": {
"engine": "Vulnogram 0.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
"assignerShortName": "apache",
"cveId": "CVE-2025-54812",
"datePublished": "2025-08-22T18:46:46.205Z",
"dateReserved": "2025-07-30T01:08:11.079Z",
"dateUpdated": "2025-11-04T21:12:52.982Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://lists.debian.org/debian-lts-announce/2025/10/msg00002.html\"}, {\"url\": \"http://www.openwall.com/lists/oss-security/2025/08/22/2\"}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2025-11-04T21:12:52.982Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-54812\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-08-22T19:07:34.778098Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-08-22T19:07:39.483Z\"}}], \"cna\": {\"title\": \"Apache Log4cxx: Improper HTML escaping in HTMLLayout\", \"source\": {\"discovery\": \"UNKNOWN\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"sponsor\", \"value\": \"Sovereign Tech Agency\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"Safety\": \"NOT_DEFINED\", \"version\": \"4.0\", \"Recovery\": \"NOT_DEFINED\", \"baseScore\": 2.1, \"Automatable\": \"NOT_DEFINED\", \"attackVector\": \"NETWORK\", \"baseSeverity\": \"LOW\", \"valueDensity\": \"NOT_DEFINED\", \"vectorString\": \"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"ACTIVE\", \"attackComplexity\": \"HIGH\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"LOW\", \"vulnIntegrityImpact\": \"LOW\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"LOW\", \"vulnConfidentialityImpact\": \"LOW\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}, {\"other\": {\"type\": \"Textual description of severity\", \"content\": {\"text\": \"low\"}}}], \"affected\": [{\"vendor\": \"Apache Software Foundation\", \"product\": \"Apache Log4cxx\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"1.5.0\", \"versionType\": \"semver\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://logging.apache.org/security.html#CVE-2025-54812\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://github.com/apache/logging-log4cxx/pull/509\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/apache/logging-log4cxx/pull/514\", \"tags\": [\"patch\"]}], \"x_generator\": {\"engine\": \"Vulnogram 0.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"Improper Output Neutralization for Logs vulnerability in Apache Log4cxx.\\n\\n\\nWhen using HTMLLayout, logger names are not properly escaped when writing out to the HTML file.\\nIf untrusted data is used to retrieve the name of a logger, an attacker could theoretically inject HTML or Javascript in order to hide information from logs or steal data from the user.\\nIn order to activate this, the following sequence must occur:\\n\\n\\n\\n * Log4cxx is configured to use HTMLLayout.\\n\\n * Logger name comes from an untrusted string\\n\\n * Logger with compromised name logs a message\\n\\n * User opens the generated HTML log file in their browser, leading to potential XSS\\n\\n\\nBecause logger names are generally constant strings, we assess the impact to users as LOW\\n\\n\\nThis issue affects Apache Log4cxx: before 1.5.0.\\n\\n\\nUsers are recommended to upgrade to version 1.5.0, which fixes the issue.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eImproper Output Neutralization for Logs vulnerability in Apache Log4cxx.\u003c/p\u003e\\n\u003cp\u003eWhen using \u003ccode\u003eHTMLLayout\u003c/code\u003e, logger names are not properly escaped when writing out to the HTML file.\\nIf untrusted data is used to retrieve the name of a logger, an attacker could theoretically inject HTML or Javascript in order to hide information from logs or steal data from the user.\\nIn order to activate this, the following sequence must occur:\u003c/p\u003e\\n\u003col\u003e\\n\u003cli\u003eLog4cxx is configured to use \u003ccode\u003eHTMLLayout\u003c/code\u003e.\u003c/li\u003e\\n\u003cli\u003eLogger name comes from an untrusted string\u003c/li\u003e\\n\u003cli\u003eLogger with compromised name logs a message\u003c/li\u003e\\n\u003cli\u003eUser opens the generated HTML log file in their browser, leading to potential XSS\u003c/li\u003e\\n\u003c/ol\u003e\\n\u003cp\u003eBecause logger names are generally constant strings, we assess the impact to users as LOW\u003c/p\u003e\\n\u003cp\u003eThis issue affects Apache Log4cxx: before \u003ccode\u003e1.5.0\u003c/code\u003e.\u003c/p\u003e\\n\u003cp\u003eUsers are recommended to upgrade to version \u003ccode\u003e1.5.0\u003c/code\u003e, which fixes the issue.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-117\", \"description\": \"CWE-117 Improper Output Neutralization for Logs\"}]}], \"providerMetadata\": {\"orgId\": \"f0158376-9dc2-43b6-827c-5f631a4d8d09\", \"shortName\": \"apache\", \"dateUpdated\": \"2025-08-22T18:46:46.205Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2025-54812\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-04T21:12:52.982Z\", \"dateReserved\": \"2025-07-30T01:08:11.079Z\", \"assignerOrgId\": \"f0158376-9dc2-43b6-827c-5f631a4d8d09\", \"datePublished\": \"2025-08-22T18:46:46.205Z\", \"assignerShortName\": \"apache\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…