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.

5789 vulnerabilities reference this CWE, most recent first.

CVE-2026-97865 (GCVE-0-2026-97865)

Vulnerability from cvelistv5 – Published: 2026-09-25 13:30 – Updated: 2026-09-25 13:46 X_Open Source
VLAI
Title
Open-Web-Analytics Remote Event Queue Endpoint queue.php loadFromArray deserialization
Summary
A security flaw has been discovered in Open-Web-Analytics up to 1.8.1. Affected is the function Event::loadFromArray of the file queue.php of the component Remote Event Queue Endpoint. Performing a manipulation results in deserialization. The attack can be initiated remotely. Upgrading to version 1.8.2 is able to address this issue. The patch is named 78c1222ec0e2119d84684032da1541120a2cdd23. The affected component should be upgraded.
Severity
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C
7.3 (High)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 13:45 UTC
CWE
Assigner
VulDB CNA under the mitre root
CNA scorecard B 82/100 over 3928 records in the last 180 days details
References
Impacted products
Vendor Product Version
n/a Open-Web-Analytics Affected: 1.8.0
Affected: 1.8.1
Unaffected: 1.8.2
    cpe:2.3:a:open-web-analytics:open-web-analytics:*:*:*:*:*:*:*:*
Credits
Customeres (VulDB User)
Show details on NVD website
To clipboard 

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CVE-2026-97296 (GCVE-0-2026-97296)

Vulnerability from cvelistv5 – Published: 2026-10-16 07:00 – Updated: 2026-10-16 15:09 X_Open Source
VLAI
Title
WordPress Gravity Forms plugin < 3.1.1 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in Rocketgenius, Inc Gravity Forms gravityforms allows Object Injection.This issue affects Gravity Forms: from n/a before 3.1.1.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 14:53 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack CNA under the mitre root
CNA scorecard C 75/100 over 2953 records in the last 180 days details
References
Impacted products
Vendor Product Version
Rocketgenius, Inc Gravity Forms Affected: 0 , < 3.1.1 (custom)
Create a notification for this product.
Date Public
2026-10-14 06:40
Credits
0xd4rk5id3 | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-97291 (GCVE-0-2026-97291)

Vulnerability from cvelistv5 – Published: 2026-09-30 17:39 – Updated: 2026-09-30 17:59
VLAI
Title
WordPress Schema & Structured Data for WP & AMP plugin <= 1.66 - PHP Object Injection vulnerability
Summary
Contributor PHP Object Injection in Schema & Structured Data for WP & AMP <= 1.66 versions.
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 17:57 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack CNA under the mitre root
CNA scorecard C 75/100 over 2953 records in the last 180 days details
References
Impacted products
Vendor Product Version
Magazine3 Schema & Structured Data for WP & AMP Affected: n/a , ≤ 1.66 (custom)
Create a notification for this product.
Credits
Ananda Dhakal (Patchstack) | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-97284 (GCVE-0-2026-97284)

Vulnerability from cvelistv5 – Published: 2026-10-01 14:34 – Updated: 2026-10-01 14:58
VLAI
Title
WordPress Icegram plugin <= 3.1.31 - PHP Object Injection vulnerability
Summary
Contributor PHP Object Injection in Icegram <= 3.1.31 versions.
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 14:58 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack CNA under the mitre root
CNA scorecard C 75/100 over 2953 records in the last 180 days details
References
Impacted products
Vendor Product Version
Icegram Icegram Affected: n/a , ≤ 3.1.31 (custom)
Create a notification for this product.
Credits
Ananda Dhakal (Patchstack) | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-97283 (GCVE-0-2026-97283)

Vulnerability from cvelistv5 – Published: 2026-10-05 18:08 – Updated: 2026-10-05 18:46 X_Open Source
VLAI
Title
WordPress Advanced Post Manager plugin <= 4.5.5 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in Liquid Web / StellarWP Advanced Post Manager advanced-post-manager allows Object Injection.This issue affects Advanced Post Manager: from n/a through 4.5.5.
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-10-05 18:46 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack CNA under the mitre root
CNA scorecard C 75/100 over 2953 records in the last 180 days details
References
Impacted products
Vendor Product Version
Liquid Web / StellarWP Advanced Post Manager Affected: 0 , ≤ 4.5.5 (custom)
Create a notification for this product.
Date Public
2026-10-03 17:44
Credits
Peter Tang | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-97278 (GCVE-0-2026-97278)

Vulnerability from cvelistv5 – Published: 2026-10-14 12:08 – Updated: 2026-10-14 14:00 X_Open Source
VLAI
Title
WordPress Polylang plugin <= 3.8.9 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in WP SYNTEX Polylang polylang allows Object Injection.This issue affects Polylang: from n/a through 3.8.9.
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-10-14 14:00 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack CNA under the mitre root
CNA scorecard C 75/100 over 2953 records in the last 180 days details
References
Impacted products
Vendor Product Version
WP SYNTEX Polylang Affected: 0 , ≤ 3.8.9 (custom)
Create a notification for this product.
Date Public
2026-10-12 11:16
Credits
Ananda Dhakal (Patchstack)
Show details on NVD website
To clipboard 

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CVE-2026-97257 (GCVE-0-2026-97257)

Vulnerability from cvelistv5 – Published: 2026-10-05 19:00 – Updated: 2026-10-06 10:41 X_Open Source
VLAI
Title
WordPress Simple Event Planner plugin <= 1.5.7 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in PressTigers Simple Event Planner simple-event-planner allows Object Injection.This issue affects Simple Event Planner: from n/a through 1.5.7.
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-10-06 10:22 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack CNA under the mitre root
CNA scorecard C 75/100 over 2953 records in the last 180 days details
References
Impacted products
Vendor Product Version
PressTigers Simple Event Planner Affected: 0 , ≤ 1.5.7 (custom)
Create a notification for this product.
Date Public
2026-10-03 18:40
Credits
Ananda Dhakal (Patchstack)
Show details on NVD website
To clipboard 

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CVE-2026-97256 (GCVE-0-2026-97256)

Vulnerability from cvelistv5 – Published: 2026-09-30 17:39 – Updated: 2026-09-30 17:59
VLAI
Title
WordPress Page Builder by SiteOrigin plugin <= 2.36.0 - PHP Object Injection vulnerability
Summary
Editor PHP Object Injection in Page Builder by SiteOrigin <= 2.36.0 versions.
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 17:58 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack CNA under the mitre root
CNA scorecard C 75/100 over 2953 records in the last 180 days details
References
Impacted products
Vendor Product Version
Greg – SiteOrigin Page Builder by SiteOrigin Affected: n/a , ≤ 2.36.0 (custom)
Create a notification for this product.
Credits
Ananda Dhakal (Patchstack) | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-97248 (GCVE-0-2026-97248)

Vulnerability from cvelistv5 – Published: 2026-09-30 12:28 – Updated: 2026-09-30 13:27
VLAI
Title
WordPress Booking Activities plugin <= 1.18.7.1 - PHP Object Injection vulnerability
Summary
Unauthenticated PHP Object Injection in Booking Activities <= 1.18.7.1 versions.
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 · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 13:01 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack CNA under the mitre root
CNA scorecard C 75/100 over 2953 records in the last 180 days details
References
Impacted products
Vendor Product Version
Booking Activities Team Booking Activities Affected: n/a , ≤ 1.18.7.1 (custom)
Create a notification for this product.
Credits
Supakiad S. (m3ez) | Patchstack Bug Bounty Program
Show details on NVD website
To clipboard 

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CVE-2026-97246 (GCVE-0-2026-97246)

Vulnerability from cvelistv5 – Published: 2026-09-30 12:28 – Updated: 2026-10-20 13:59 X_Known Exploited Vulnerability X_Open Source
VLAI
Title
WordPress ShortPixel Image Optimizer plugin <= 6.5.5 - PHP Object Injection vulnerability
Summary
Deserialization of Untrusted Data vulnerability in ShortPixel ShortPixel Image Optimizer shortpixel-image-optimiser allows Object Injection.This issue affects ShortPixel Image Optimizer: from n/a through 6.5.5.
Severity
4.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 13:07 UTC
CWE
  • CWE-502 - Deserialization of Untrusted Data
Assigner
Patchstack CNA under the mitre root
CNA scorecard C 75/100 over 2953 records in the last 180 days details
References
Impacted products
Vendor Product Version
ShortPixel ShortPixel Image Optimizer Affected: 0 , ≤ 6.5.5 (custom)
Create a notification for this product.
Date Public
2026-09-24 10:54
Credits
Asim Alshaya | Patchstack Bug Bounty Program
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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