{"id":"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.","modified":"2026-04-03T03:49:35.166346Z","published":"2026-04-03T03:43:13Z","database_specific":{"github_reviewed_at":"2026-04-03T03:43:13Z","nvd_published_at":null,"cwe_ids":["CWE-331"],"severity":"HIGH","github_reviewed":true},"references":[{"type":"WEB","url":"https://github.com/auth0/wordpress/security/advisories/GHSA-vfpx-q664-h93m"},{"type":"PACKAGE","url":"https://github.com/auth0/wordpress"}],"affected":[{"package":{"name":"auth0/wordpress","ecosystem":"Packagist","purl":"pkg:composer/auth0/wordpress"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.0.0-BETA0"},{"fixed":"5.6.0"}]}],"versions":["5.0.0","5.0.0-BETA0","5.0.0-BETA1","5.0.1","5.1.0","5.2.0","5.2.1","5.3.0","5.4.0","5.5.0"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-vfpx-q664-h93m/GHSA-vfpx-q664-h93m.json","last_known_affected_version_range":"\u003c= 5.5.0"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N"}]}