GitHub Advisoryadvisory · Packagist
GHSA-9wg9-93h9-j8ch Auth0 Symfony SDK Vulnerable to Brute Force Authentication Tags of CookieStore Sessions
CRITICAL
Official page ↗
- Ecosystem
- Packagist
- Packages
- auth0/symfony
- Severity
- Critical
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- Weaknesses
- CWE-287
- Reviewed
- 2025-05-17
Affected packages
• Packagist auth0/symfony: < 5.4.0 → fixed in 5.4.0
Description
Overview
Session cookies of applications using the Auth0 symfony SDK configured with CookieStore have authentication tags that can be brute forced, which may result in unauthorized access.
Am I Affected?
You are affected by this vulnerability if you meet the following pre-conditions:
1. Applications using the Auth0 symfony SDK with version <=5.3.1
2. Auth0/Symfony SDK uses the Auth0-PHP SDK with version 8.0.0-BETA1 or higher and below 8.14.0.
3. Session storage configured with CookieStore.
Fix
Upgrade Auth0/symfony to v5.4.0. As an additional precautionary measure, we recommend rotating your cookie encryption keys. Note that once updated, any previous session cookies will be rejected.
Acknowledgement
Okta would like to thank Félix Charette for discovering this vulnerability.
Related
Weakness · CWE (1)
- CWE-287 Improper Authentication weakness
References
- https://github.com/auth0/symfony/security/advisories/GHSA-9wg9-93h9-j8ch web
- https://nvd.nist.gov/vuln/detail/CVE-2025-47275 advisory
- https://github.com/auth0/symfony/commit/9a7294f08a32f17a0e77c8522a648195b6940340 web
- https://github.com/auth0/symfony package
- https://github.com/auth0/symfony/releases/tag/5.4.0 web