Cloud Vulnerability DB
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Vulnerability DatabaseGHSA-98j6-67v3-mw34
GHSA-98j6-67v3-mw34:
PHP vulnerability analysis and mitigation
Overview
The Auth0 Symfony SDK contains a critical vulnerability (GHSA-98j6-67v3-mw34) related to insecure deserialization of cookie data, affecting versions between 5.0.0-BETA0 to 5.0.0. The vulnerability was discovered by Andreas Forsblom and disclosed on June 3, 2025. The issue affects applications using the Auth0 Symfony SDK that relies on Auth0-PHP SDK versions 8.0.0-BETA3 to 8.3.0 (GitHub Advisory).
Technical details
The vulnerability stems from insecure deserialization of cookie data in the SDK. Since the SDK processes cookie content without prior authentication, attackers can exploit this by sending specially crafted cookies containing malicious serialized data. The vulnerability has been assigned a Critical severity rating with a CVSS score of 9.3. The CVSS metrics indicate Network attack vector, Low attack complexity, and No privileges required for exploitation (GitHub Advisory, NVD).
Impact
The vulnerability can lead to significant system compromise, with high impact on subsequent system confidentiality, integrity, and availability. While the vulnerable system's direct confidentiality impact is none, it has high integrity impact. The subsequent system faces high impacts across all security properties - confidentiality, integrity, and availability (GitHub Advisory).
Mitigation and workarounds
Users are advised to upgrade Auth0/symfony to version 5.4.0 or later to address this vulnerability. This patched version includes security improvements that prevent the insecure deserialization of cookie data (GitHub Advisory).
Additional resources
Source: This report was generated using AI
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