Cloud Vulnerability DB
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Vulnerability DatabaseGHSA-862m-5253-832r
GHSA-862m-5253-832r:
PHP vulnerability analysis and mitigation
Overview
The Auth0 WordPress plugin (GHSA-862m-5253-832r) contains a critical vulnerability related to insecure deserialization of cookie data, discovered and disclosed in June 2025. The vulnerability affects versions 5.0.0-BETA0 through 5.0.1 of the WordPress plugin that uses Auth0-PHP SDK versions 8.0.0-BETA3 to 8.3.0. This security issue has been assigned CVE-2025-48951 and carries a Critical severity rating with a CVSS score of 9.3 (GitHub Advisory).
Technical details
The vulnerability stems from the insecure deserialization of cookie data in the Auth0 WordPress plugin. The issue is particularly critical because the SDKs process cookie content without prior authentication, allowing potential exploitation through specially crafted cookies containing malicious serialized data. The vulnerability has been classified as CWE-502 (Deserialization of Untrusted Data) and received a CVSS v4.0 base score of 9.3, with the vector string CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:H (Auth0 PHP Advisory).
Impact
The vulnerability's exploitation could lead to significant security breaches with high impact on system integrity and subsequent system confidentiality, integrity, and availability. The CVSS metrics indicate that while the vulnerable system's confidentiality might not be directly impacted, there are high risks to integrity, and the subsequent systems face high risks across all security aspects (NVD CVE).
Mitigation and workarounds
The recommended mitigation is to upgrade the Auth0 WordPress plugin to version 5.3.0 or later, which contains the security patch. This update addresses the deserialization vulnerability and implements proper cookie data validation. The fix is part of a broader security update that also includes patches for related Auth0 SDKs (Laravel Advisory).
Additional resources
Source: This report was generated using AI
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