GHSA-9wg9-93h9-j8ch
Auth0 Symfony SDK Vulnerable to Brute Force Authentication Tags of CookieStore Sessions
Quick fix
GHSA-9wg9-93h9-j8ch — auth0/symfony: upgrade to the fixed version with the command below.
composer require auth0/symfony:^5.4.0Details
**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.
Are you affected?
Enter the version of the package you're using.
Affected packages
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]