{"id":"GHSA-862m-5253-832r","aliases":[],"title":"Auth0 Wordpress Plugin vulnerable to Deserialization of Untrusted Data","description":"**Overview**\nThe Auth0 Wordpress plugin contains a critical vulnerability due to insecure deserialization of cookie data. If exploited, since SDKs process cookie content without prior authentication, a threat actor could send a specially crafted cookie containing malicious serialized data.\n\n**Am I Affected?**\nYou are affected by this vulnerability if you meet the following preconditions:\n\n1. Applications using the Auth0 WordPress plugin, versions between 5.0.0 BETA-0 to 5.0.1. \n2. Auth0 WordPress plugin uses the Auth0-PHP SDK with version 8.0.0-BETA3 to 8.3.0.\n\n**Fix**\nUpgrade the Auth0 WordPress plugin to the latest version (v5.3.0).","severity":"critical","score":9.3,"published":"2025-06-05T01:19:24.000Z","modified":"2026-02-04T02:51:35.717Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"auth0/wordpress","ranges":[{"events":[{"introduced":"5.0.0-BETA0"},{"fixed":"5.1.0"}],"type":"ECOSYSTEM"}],"versions":["5.0.0","5.0.0-BETA0","5.0.0-BETA1","5.0.1"],"fixed":["5.1.0"]}],"sourceAffected":[],"references":["https://github.com/auth0/auth0-PHP/security/advisories/GHSA-v9m8-9xxp-q492","https://github.com/auth0/laravel-auth0/security/advisories/GHSA-c42h-56wx-h85q","https://github.com/auth0/symfony/security/advisories/GHSA-98j6-67v3-mw34","https://github.com/auth0/wordpress/security/advisories/GHSA-862m-5253-832r","https://nvd.nist.gov/vuln/detail/CVE-2025-48951","https://github.com/auth0/wordpress"],"sources":[{"name":"OSV","id":"GHSA-862m-5253-832r","modified":"2026-02-04T02:51:35.717732Z","url":"https://osv.dev/vulnerability/GHSA-862m-5253-832r"}],"assessments":[{"source":"OSV","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:H/SI:H/SA:H","score":9.3}]}