Common Weakness Enumeration

CWE-502

Allowed

Deserialization of Untrusted Data

Abstraction: Base · Status: Draft

API response cwe.mitre.org

The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

4801 vulnerabilities reference this CWE, most recent first.

CVE-2025-69099 (GCVE-0-2025-69099)

Vulnerability from cvelistv5 – Published: 2026-01-22 16:52 – Updated: 2026-04-28 20:42
VLAI
Title
WordPress North theme <= 5.7.5 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in fuelthemes North north-wp allows Object Injection.This issue affects North: from n/a through <= 5.7.5.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
fuelthemes North Affected: 0 , ≤ 5.7.5 (custom)
Create a notification for this product.
Date Public
2026-04-01 16:03
Credits
João Pedro S Alcântara (Kinorth) | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2025-69079 (GCVE-0-2025-69079)

Vulnerability from cvelistv5 – Published: 2026-01-22 16:52 – Updated: 2026-04-28 20:41
VLAI
Title
WordPress Sound | Musical Instruments Online Store theme <= 1.6.9 - Deserialization of untrusted data vulnerability
Summary
Deserialization of Untrusted Data vulnerability in ThemeREX Sound | Musical Instruments Online Store musicplace allows Object Injection.This issue affects Sound | Musical Instruments Online Store: from n/a through <= 1.6.9.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Date Public
2026-04-01 16:03
Credits
Tran Nguyen Bao Khanh (VCI - VNPT Cyber Immunity) | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2025-69036 (GCVE-0-2025-69036)

Vulnerability from cvelistv5 – Published: 2026-01-22 16:52 – Updated: 2026-04-28 20:34
VLAI
Title
WordPress Tech Life CPT plugin <= 16.4 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in strongholdthemes Tech Life CPT techlife-cpt allows Object Injection.This issue affects Tech Life CPT: from n/a through <= 16.4.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
strongholdthemes Tech Life CPT Affected: 0 , ≤ 16.4 (custom)
Create a notification for this product.
Date Public
2026-04-01 16:03
Credits
Phat RiO | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2025-69035 (GCVE-0-2025-69035)

Vulnerability from cvelistv5 – Published: 2026-01-22 16:52 – Updated: 2026-04-28 20:34
VLAI
Title
WordPress Dental Care CPT plugin <= 20.2 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in strongholdthemes Dental Care CPT dentalcare-cpt allows Object Injection.This issue affects Dental Care CPT: from n/a through <= 20.2.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
strongholdthemes Dental Care CPT Affected: 0 , ≤ 20.2 (custom)
Create a notification for this product.
Date Public
2026-04-01 16:03
Credits
Phat RiO | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2025-69002 (GCVE-0-2025-69002)

Vulnerability from cvelistv5 – Published: 2026-01-22 16:52 – Updated: 2026-04-28 20:29
VLAI
Title
WordPress OneLife theme <= 3.9 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in designthemes OneLife onelife allows Object Injection.This issue affects OneLife: from n/a through <= 3.9.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
designthemes OneLife Affected: 0 , ≤ 3.9 (custom)
Create a notification for this product.
Date Public
2026-04-01 16:03
Credits
Tran Nguyen Bao Khanh (VCI - VNPT Cyber Immunity) | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2025-68903 (GCVE-0-2025-68903)

Vulnerability from cvelistv5 – Published: 2026-01-22 16:52 – Updated: 2026-04-28 20:08
VLAI
Title
WordPress Anona theme <= 8.0 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in AivahThemes Anona anona allows Object Injection.This issue affects Anona: from n/a through <= 8.0.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
AivahThemes Anona Affected: 0 , ≤ 8.0 (custom)
Create a notification for this product.
Date Public
2026-04-01 16:02
Credits
Tran Nguyen Bao Khanh (VCI - VNPT Cyber Immunity) | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2025-68899 (GCVE-0-2025-68899)

Vulnerability from cvelistv5 – Published: 2026-01-22 16:52 – Updated: 2026-04-28 20:07
VLAI
Title
WordPress Vivagh theme <= 2.4 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in designthemes Vivagh vivagh allows Object Injection.This issue affects Vivagh: from n/a through <= 2.4.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
designthemes Vivagh Affected: 0 , ≤ 2.4 (custom)
Create a notification for this product.
Date Public
2026-04-01 16:02
Credits
Tran Nguyen Bao Khanh (VCI - VNPT Cyber Immunity) | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2025-68853 (GCVE-0-2025-68853)

Vulnerability from cvelistv5 – Published: 2026-02-20 15:46 – Updated: 2026-04-28 16:14
VLAI
Title
WordPress Contact Manager plugin <= 9.1.1 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in Kleor Contact Manager contact-manager allows Object Injection.This issue affects Contact Manager: from n/a through <= 9.1.1.
Severity
8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
Kleor Contact Manager Affected: 0 , ≤ 9.1.1 (custom)
Create a notification for this product.
Date Public
2026-04-22 14:20
Credits
Skalucy | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2025-68665 (GCVE-0-2025-68665)

Vulnerability from cvelistv5 – Published: 2025-12-23 22:56 – Updated: 2025-12-24 14:38
VLAI
Title
LangChain serialization injection vulnerability enables secret extraction
Summary
LangChain is a framework for building LLM-powered applications. Prior to @langchain/core versions 0.3.80 and 1.1.8, and prior to langchain versions 0.3.37 and 1.2.3, a serialization injection vulnerability exists in LangChain JS's toJSON() method (and subsequently when string-ifying objects using JSON.stringify(). The method did not escape objects with 'lc' keys when serializing free-form data in kwargs. The 'lc' key is used internally by LangChain to mark serialized objects. When user-controlled data contains this key structure, it is treated as a legitimate LangChain object during deserialization rather than plain user data. This issue has been patched in @langchain/core versions 0.3.80 and 1.1.8, and langchain versions 0.3.37 and 1.2.3
Severity
8.6 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
langchain-ai langchainjs Affected: @langchain/core >= 1.0.0, < 1.1.8
Affected: @langchain/core < 0.3.80
Affected: langchain >= 1.0.0, < 1.2.3
Affected: langchain < 0.3.37
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-68664 (GCVE-0-2025-68664)

Vulnerability from cvelistv5 – Published: 2025-12-23 22:47 – Updated: 2025-12-24 14:40
VLAI
Title
LangChain serialization injection vulnerability enables secret extraction in dumps/loads APIs
Summary
LangChain is a framework for building agents and LLM-powered applications. Prior to versions 0.3.81 and 1.2.5, a serialization injection vulnerability exists in LangChain's dumps() and dumpd() functions. The functions do not escape dictionaries with 'lc' keys when serializing free-form dictionaries. The 'lc' key is used internally by LangChain to mark serialized objects. When user-controlled data contains this key structure, it is treated as a legitimate LangChain object during deserialization rather than plain user data. This issue has been patched in versions 0.3.81 and 1.2.5.
Severity
9.3 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:N
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
langchain-ai langchain Affected: >= 1.0.0, < 1.2.5
Affected: < 0.3.81
Create a notification for this product.
Show details on NVD website
To clipboard 

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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.

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