CVE-2026-65556
Received Received - Intake

Unauthenticated PHP Object Injection in WPBruiser

Publication date: 2026-08-06

Last updated on: 2026-08-06

Assigner: Patchstack

Description
Unauthenticated PHP Object Injection in WPBruiser {no- Captcha anti-Spam} <= 3.1.43 versions.

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Meta Information

Published
2026-08-06
Last Modified
2026-08-06
Generated
2026-08-06
AI Q&A
2026-08-06
EPSS Evaluated
N/A
NVD
CVE-2026-65556
EUVD
EUVD-2026-53983

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
wpbruiser no_captcha_anti_spam to 3.1.43 (inc)
patchstack wpbruiser_no_captcha_anti_spam to 3.1.43 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-502 The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.

Attack-Flow Graph

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Executive Summary

This is an unauthenticated PHP Object Injection vulnerability in the WPBruiser {no-Captcha anti-Spam} plugin versions 3.1.43 and below. It allows attackers to inject malicious PHP objects without authentication, potentially leading to code execution, SQL injection, or other attacks if a suitable POP chain exists.

Impact Analysis

This vulnerability can allow unauthenticated attackers to execute arbitrary code, manipulate databases, access sensitive data, or disrupt services on affected websites. It poses a high risk due to the potential for widespread exploitation across thousands of sites.

Compliance Impact

This vulnerability could lead to unauthorized data access or breaches, violating GDPR and HIPAA requirements for data protection and confidentiality. Organizations may face compliance penalties if exploited.

Mitigation Strategies

Immediately apply Patchstack's temporary mitigation rule to block attacks. If updating the plugin is not possible, contact your hosting provider or web developer for assistance. Avoid relying on unauthenticated access to the plugin.

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