{"id":"GHSA-vfpx-q664-h93m","aliases":[],"url":"https://o3.security/vulnerability/GHSA-vfpx-q664-h93m","summary":"Auth0 WordPress Plugin has Insufficient Entropy in Cookie Encryption","details":"### Impact\nIn applications built with the Auth0 PHP SDK, cookies are encrypted with insufficient entropy, which may result in threat actors brute-forcing the encryption key and forging session cookies.\n\n### Am I Affected?\nConsumers are affected if their application meets the following preconditions:\n- It is using the Auth0 WordPress Plugin, versions between 5.0.0-BETA0 and 5.5.0\n- Auth0 WordPress plugin using the Auth0-PHP SDK versions between 8.0.0 to 8.18.0.\n\n### Resolution\nUpgrade Auth0/wordpress to version 5.6.0 or greater.","published":"2026-04-03T03:43:13Z","modified":"2026-04-03T03:49:35.166346Z","cvss":{"score":8.2,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"auth0/wordpress","fixedVersion":"5.6.0"}],"fix":null,"references":[{"type":"WEB","url":"https://github.com/auth0/wordpress/security/advisories/GHSA-vfpx-q664-h93m"},{"type":"PACKAGE","url":"https://github.com/auth0/wordpress"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-04-03T03:49:35.166346Z"}}