Common Weakness Enumeration
CWE-502
AllowedDeserialization of Untrusted Data
Abstraction: Base · Status: Draft
The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.
2667 vulnerabilities reference this CWE, most recent first.
CVE-2026-27439 (GCVE-0-2026-27439)
Vulnerability from cvelistv5 – Published: 2026-03-05 05:54 – Updated: 2026-04-28 16:15
VLAI
EPSS
VEX
Title
WordPress Dentario theme <= 1.5 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in ThemeREX Dentario dentario allows Object Injection.This issue affects Dentario: from n/a through <= 1.5.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-06 18:43 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/Wordpress/Theme/d… | vdb-entry |
Date Public
2026-04-01 16:05
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CVE-2026-27438 (GCVE-0-2026-27438)
Vulnerability from cvelistv5 – Published: 2026-03-05 05:54 – Updated: 2026-04-28 16:15
VLAI
EPSS
VEX
Title
WordPress Kingler theme <= 1.7 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in ThemeREX Kingler kingler allows Object Injection.This issue affects Kingler: from n/a through <= 1.7.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-09 14:40 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/Wordpress/Theme/k… | vdb-entry |
Date Public
2026-04-01 16:05
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CVE-2026-27437 (GCVE-0-2026-27437)
Vulnerability from cvelistv5 – Published: 2026-03-05 05:54 – Updated: 2026-04-28 16:15
VLAI
EPSS
VEX
Title
WordPress Tennis Club theme <= 1.2.3 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in ThemeREX Tennis Club tennis-sportclub allows Object Injection.This issue affects Tennis Club: from n/a through <= 1.2.3.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-06 18:47 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/Wordpress/Theme/t… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| ThemeREX | Tennis Club |
Affected:
0 , ≤ 1.2.3
(custom)
|
Date Public
2026-04-01 16:05
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CVE-2026-27429 (GCVE-0-2026-27429)
Vulnerability from cvelistv5 – Published: 2026-06-16 20:57 – Updated: 2026-06-17 10:44
VLAI
EPSS
VEX
Title
WordPress Nifty theme <= 1.4.1 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Nifty <= 1.4.1 versions.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-17 10:28 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/theme/n… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| BoldThemes | Nifty |
Affected:
n/a , ≤ 1.4.1
(custom)
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CVE-2026-27417 (GCVE-0-2026-27417)
Vulnerability from cvelistv5 – Published: 2026-03-05 05:54 – Updated: 2026-04-28 16:15
VLAI
EPSS
VEX
Title
WordPress Sweet Date theme < 4.0.1 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in SeventhQueen Sweet Date sweetdate allows Object Injection.This issue affects Sweet Date: from n/a through < 4.0.1.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-06 18:49 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/Wordpress/Theme/s… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SeventhQueen | Sweet Date |
Affected:
0 , ≤ 4.0.1
(custom)
|
Date Public
2026-04-01 16:05
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CVE-2026-27414 (GCVE-0-2026-27414)
Vulnerability from cvelistv5 – Published: 2026-07-02 11:14 – Updated: 2026-07-02 15:53
VLAI
EPSS
VEX
Title
WordPress Werkstatt theme <= 4.8.3 - PHP Object Injection vulnerability
Summary
Contributor PHP Object Injection in Werkstatt <= 4.8.3 versions.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-02 13:39 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/theme/w… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Fuelthemes | Werkstatt |
Affected:
n/a , ≤ 4.8.3
(custom)
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CVE-2026-27410 (GCVE-0-2026-27410)
Vulnerability from cvelistv5 – Published: 2026-06-17 09:50 – Updated: 2026-06-17 15:33
VLAI
EPSS
VEX
Title
WordPress Slimstat Analytics plugin < 5.4.0 - Deserialization of untrusted data vulnerability
Summary
Unauthenticated Deserialization of untrusted data in Slimstat Analytics < 5.4.0 versions.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-17 15:21 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| VeronaLabs | Slimstat Analytics |
Affected:
n/a , < 5.4.0
(custom)
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CVE-2026-27380 (GCVE-0-2026-27380)
Vulnerability from cvelistv5 – Published: 2026-08-13 13:36 – Updated: 2026-08-13 15:13
VLAI
EPSS
VEX
Title
WordPress Car Rental Manager plugin <= 1.3.9 - PHP Object Injection vulnerability
Summary
Editor PHP Object Injection in Car Rental Manager <= 1.3.9 versions.
Severity
7.2 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-13 15:11 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/wordpress/plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| magepeopleteam | Car Rental Manager |
Affected:
n/a , ≤ 1.3.9
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CVE-2026-27379 (GCVE-0-2026-27379)
Vulnerability from cvelistv5 – Published: 2026-03-05 05:53 – Updated: 2026-04-28 16:15
VLAI
EPSS
VEX
Title
WordPress NextScripts plugin <= 4.4.7 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in NextScripts NextScripts social-networks-auto-poster-facebook-twitter-g allows Object Injection.This issue affects NextScripts: from n/a through <= 4.4.7.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-09 16:00 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/Wordpress/Plugin/… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| NextScripts | NextScripts |
Affected:
0 , ≤ 4.4.7
(custom)
|
Date Public
2026-04-01 16:05
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CVE-2026-27369 (GCVE-0-2026-27369)
Vulnerability from cvelistv5 – Published: 2026-03-05 05:53 – Updated: 2026-04-28 16:15
VLAI
EPSS
VEX
Title
WordPress Celeste theme <= 1.3.6 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in BoldThemes Celeste celeste allows Object Injection.This issue affects Celeste: from n/a through <= 1.3.6.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-09 18:03 UTC
CWE
- CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://patchstack.com/database/Wordpress/Theme/c… | vdb-entry |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| BoldThemes | Celeste |
Affected:
0 , ≤ 1.3.6
(custom)
|
Date Public
2026-04-01 16:05
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Mitigation
Architecture and Design
Implementation
If available, use the signing/sealing features of the programming language to assure that deserialized data has not been tainted. For example, a hash-based message authentication code (HMAC) could be used to ensure that data has not been modified.
Mitigation
Implementation
When deserializing data, populate a new object rather than just deserializing. The result is that the data flows through safe input validation and that the functions are safe.
Mitigation
Implementation
Explicitly define a final object() to prevent deserialization.
Mitigation
Architecture and Design
Implementation
- Make fields transient to protect them from deserialization.
- An attempt to serialize and then deserialize a class containing transient fields will result in NULLs where the transient data should be. This is an excellent way to prevent time, environment-based, or sensitive variables from being carried over and used improperly.
Mitigation
Implementation
Avoid having unnecessary types or gadgets (a sequence of instances and method invocations that can self-execute during the deserialization process, often found in libraries) available that can be leveraged for malicious ends. This limits the potential for unintended or unauthorized types and gadgets to be leveraged by the attacker. Add only acceptable classes to an allowlist. Note: new gadgets are constantly being discovered, so this alone is not a sufficient mitigation.
Mitigation
Architecture and Design
Implementation
Employ cryptography of the data or code for protection. However, it's important to note that it would still be client-side security. This is risky because if the client is compromised then the security implemented on the client (the cryptography) can be bypassed.
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].
CAPEC-586: Object Injection
An adversary attempts to exploit an application by injecting additional, malicious content during its processing of serialized objects. Developers leverage serialization in order to convert data or state into a static, binary format for saving to disk or transferring over a network. These objects are then deserialized when needed to recover the data/state. By injecting a malformed object into a vulnerable application, an adversary can potentially compromise the application by manipulating the deserialization process. This can result in a number of unwanted outcomes, including remote code execution.