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.

4820 vulnerabilities reference this CWE, most recent first.

CVE-2025-48336 (GCVE-0-2025-48336)

Vulnerability from cvelistv5 – Published: 2025-05-29 18:54 – Updated: 2026-04-28 16:12
VLAI
Title
WordPress Course Builder < 3.6.6 - PHP Object Injection Vulnerability
Summary
Deserialization of Untrusted Data vulnerability in ThimPress Course Builder course-builder allows Object Injection.This issue affects Course Builder: from n/a through < 3.6.6.
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
Vendor Product Version
ThimPress Course Builder Affected: 0 , ≤ 3.6.6 (custom)
Create a notification for this product.
Date Public
2026-04-01 16:40
Credits
Aiden | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2025-48289 (GCVE-0-2025-48289)

Vulnerability from cvelistv5 – Published: 2025-05-23 12:43 – Updated: 2026-04-28 16:12
VLAI
Title
WordPress Kids Planet theme <= 2.2.14 - PHP Object Injection Vulnerability
Summary
Deserialization of Untrusted Data vulnerability in AncoraThemes Kids Planet kidsplanet allows Object Injection.This issue affects Kids Planet: from n/a through <= 2.2.14.
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
Vendor Product Version
AncoraThemes Kids Planet Affected: 0 , ≤ 2.2.14 (custom)
Create a notification for this product.
Date Public
2026-04-01 16:40
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-2025-48287 (GCVE-0-2025-48287)

Vulnerability from cvelistv5 – Published: 2025-05-23 12:43 – Updated: 2026-04-28 16:12
VLAI
Title
WordPress Pix 4x sem juros - Pagaleve plugin <= 1.6.9 - PHP Object Injection Vulnerability
Summary
Deserialization of Untrusted Data vulnerability in Pagaleve Pix 4x sem juros - Pagaleve wc-pagaleve allows Object Injection.This issue affects Pix 4x sem juros - Pagaleve: 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
Vendor Product Version
Pagaleve Pix 4x sem juros - Pagaleve Affected: 0 , ≤ 1.6.9 (custom)
Create a notification for this product.
Date Public
2026-04-01 16:40
Credits
timomangcut | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2025-48200 (GCVE-0-2025-48200)

Vulnerability from cvelistv5 – Published: 2025-05-21 00:00 – Updated: 2025-05-22 19:51
VLAI
Summary
The sr_feuser_register extension through 12.4.8 for TYPO3 allows Remote Code Execution.
Severity
10 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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
Vendor Product Version
TYPO3 sr feuser register extension Affected: 5.1.0 , < 12.5.0 (semver)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-48134 (GCVE-0-2025-48134)

Vulnerability from cvelistv5 – Published: 2025-05-16 15:45 – Updated: 2026-05-12 00:16
VLAI
Title
WordPress WP Tabs plugin <= 2.2.12 - PHP Object Injection Vulnerability
Summary
Deserialization of Untrusted Data vulnerability in ShapedPlugin LLC WP Tabs wp-expand-tabs-free allows Object Injection.This issue affects WP Tabs: from n/a through <= 2.2.12.
Severity
7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:H/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
ShapedPlugin LLC WP Tabs Affected: 0 , ≤ 2.2.12 (custom)
Create a notification for this product.
Date Public
2026-04-01 16:40
Credits
Nguyen Ngoc Quang Bach (maysbachs) | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2025-48101 (GCVE-0-2025-48101)

Vulnerability from cvelistv5 – Published: 2025-09-09 16:26 – Updated: 2026-04-28 16:12
VLAI
Title
WordPress Constant Contact for WordPress Plugin <= 4.1.1 - PHP Object Injection Vulnerability
Summary
Deserialization of Untrusted Data vulnerability in webdevstudios Constant Contact for WordPress allows Object Injection. This issue affects Constant Contact for WordPress: from n/a through 4.1.1.
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
webdevstudios Constant Contact for WordPress Affected: n/a , ≤ 4.1.1 (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

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CVE-2025-48086 (GCVE-0-2025-48086)

Vulnerability from cvelistv5 – Published: 2025-11-06 15:53 – Updated: 2026-04-28 16:12
VLAI
Title
WordPress Ajax Search Lite plugin <= 4.13.3 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in wpdreams Ajax Search Lite ajax-search-lite allows Object Injection.This issue affects Ajax Search Lite: from n/a through <= 4.13.3.
Severity
5.5 (Medium)
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:L
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
wpdreams Ajax Search Lite Affected: 0 , ≤ 4.13.3 (custom)
Create a notification for this product.
Date Public
2026-04-22 14:25
Credits
Valentinos Chouris | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2025-48018 (GCVE-0-2025-48018)

Vulnerability from cvelistv5 – Published: 2025-05-20 15:14 – Updated: 2025-05-20 15:43
VLAI
Title
Deserialization of Untrusted Data
Summary
An authenticated user can modify application state data.
Severity
7.5 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/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
SEL
References
Impacted products
Show details on NVD website
To clipboard 

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CVE-2025-47994 (GCVE-0-2025-47994)

Vulnerability from cvelistv5 – Published: 2025-07-08 16:57 – Updated: 2026-02-13 19:06
VLAI
Title
Microsoft Office Elevation of Privilege Vulnerability
Summary
Deserialization of untrusted data in Microsoft Office allows an unauthorized attacker to elevate privileges locally.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
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
Microsoft Microsoft 365 Apps for Enterprise Affected: 16.0.1 , < https://aka.ms/OfficeSecurityReleases (custom)
Create a notification for this product.
Microsoft Microsoft Office 2016 Affected: 16.0.0 , < 16.0.5508.1001 (custom)
Create a notification for this product.
Microsoft Microsoft Office 2019 Affected: 19.0.0 , < https://aka.ms/OfficeSecurityReleases (custom)
Create a notification for this product.
Microsoft Microsoft Office LTSC 2021 Affected: 16.0.1 , < https://aka.ms/OfficeSecurityReleases (custom)
Create a notification for this product.
Microsoft Microsoft Office LTSC 2024 Affected: 16.0.0 , < https://aka.ms/OfficeSecurityReleases (custom)
Create a notification for this product.
Date Public
2025-07-08 07:00
Show details on NVD website
To clipboard 

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CVE-2025-47784 (GCVE-0-2025-47784)

Vulnerability from cvelistv5 – Published: 2025-05-15 19:21 – Updated: 2025-05-16 16:15
VLAI
Title
Emlog vulnerable to Deserialization of Untrusted Data
Summary
Emlog is an open source website building system. Versions 2.5.13 and prior have a deserialization vulnerability. A user who creates a carefully crafted nickname can cause `str_replace` to replace the value of `name_orig` with empty, causing deserialization to fail and return `false`. Commit 9643250802188b791419e3c2188577073256a8a2 fixes the issue.
Severity
6.6 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
References
Impacted products
Vendor Product Version
emlog emlog Affected: <= 2.5.13
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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