{"id":"GHSA-9wg9-93h9-j8ch","aliases":[],"title":"Auth0 Symfony SDK Vulnerable to Brute Force Authentication Tags of CookieStore Sessions","description":"**Overview**\nSession 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.\n\n**Am I Affected?**\nYou are affected by this vulnerability if you meet the following pre-conditions:\n1. Applications using the Auth0 symfony SDK with version <=5.3.1\n2. Auth0/Symfony SDK uses the Auth0-PHP SDK with version 8.0.0-BETA1 or higher and below 8.14.0. \n3. Session storage configured with CookieStore.\n\n\n**Fix**\nUpgrade 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.\n\n**Acknowledgement**\nOkta would like to thank Félix Charette for discovering this vulnerability.","severity":"critical","score":9.1,"published":"2025-05-17T15:06:54.000Z","modified":"2026-02-05T14:17:42.152Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"auth0/symfony","ranges":[{"events":[{"introduced":"0"},{"fixed":"5.4.0"}],"type":"ECOSYSTEM"}],"versions":["0.0.1","0.0.2","0.0.3","1.0.0","1.2.0","1.2.1","1.2.10","1.2.2","1.2.3","1.2.4","1.2.5","1.2.6","1.2.7","1.2.8","1.2.9","2.0.0","2.0.1","2.0.2","2.0.3","3.0.0","3.0.0-beta.1","3.0.0-beta.2","3.0.0-beta.3","3.0.0-beta.4","3.0.0-beta.5","3.0.0-rc.1","3.0.1","3.0.2","3.1.0","3.2.0","3.3.0","3.3.1","3.4.0","4.0.0","5.0.0","5.0.0-BETA0","5.0.0-BETA1","5.1.0","5.2.0","5.2.1","5.2.2","5.2.3","5.3.0","5.3.1"],"fixed":["5.4.0"]}],"references":["https://github.com/auth0/symfony/security/advisories/GHSA-9wg9-93h9-j8ch","https://nvd.nist.gov/vuln/detail/CVE-2025-47275","https://github.com/auth0/symfony/commit/9a7294f08a32f17a0e77c8522a648195b6940340","https://github.com/auth0/symfony","https://github.com/auth0/symfony/releases/tag/5.4.0"],"sources":[{"name":"OSV","id":"GHSA-9wg9-93h9-j8ch","modified":"2026-02-05T14:17:42.152332Z","url":"https://osv.dev/vulnerability/GHSA-9wg9-93h9-j8ch"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1}]}