{"id":"CVE-2025-48951","aliases":["GHSA-v9m8-9xxp-q492"],"url":"https://o3.security/vulnerability/CVE-2025-48951","summary":"Auth0-PHP SDK Deserialization of Untrusted Data vulnerability","details":"**Overview**\nThe Auth0 PHP SDK contains a 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-PHP SDK, versions between 8.0.0-BETA3 to 8.3.0. \n2. Applications using the following SDKs that rely on the Auth0-PHP SDK versions between 8.0.0-BETA3 to 8.3.0:\n    a. Auth0/symfony,\n    b. Auth0/laravel-auth0,\n    c. Auth0/wordpress.\n\n**Fix**\nUpgrade Auth0/Auth0-PHP to 8.3.1.\n\n**Acknowledgement**\nOkta would like to thank Andreas Forsblom for discovering this vulnerability.","published":"2025-06-03T20:52:35.064Z","modified":"2026-08-12T03:51:28.792729992Z","cvss":null,"epss":{"score":0.00746,"percentile":0.5316,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"auth0/auth0-php","fixedVersion":"8.3.1"}],"fix":{"url":"https://github.com/auth0/auth0-PHP/commit/04b1f5daa8bdfebc5e740ec5ca0fb2df1648a715","label":"auth0/auth0-PHP@04b1f5d"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/48xxx/CVE-2025-48951.json"},{"type":"ADVISORY","url":"https://github.com/auth0/auth0-PHP/security/advisories/GHSA-v9m8-9xxp-q492"},{"type":"ADVISORY","url":"https://github.com/auth0/laravel-auth0/security/advisories/GHSA-c42h-56wx-h85q"},{"type":"ADVISORY","url":"https://github.com/auth0/symfony/security/advisories/GHSA-98j6-67v3-mw34"},{"type":"ADVISORY","url":"https://github.com/auth0/wordpress/security/advisories/GHSA-862m-5253-832r"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-48951"},{"type":"FIX","url":"https://github.com/auth0/auth0-PHP/commit/04b1f5daa8bdfebc5e740ec5ca0fb2df1648a715"},{"type":"PACKAGE","url":"https://github.com/auth0/auth0-PHP"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:28.792729992Z"}}