{"id":"GHSA-v9m8-9xxp-q492","aliases":["CVE-2025-48951"],"title":"Auth0-PHP SDK Deserialization of Untrusted Data vulnerability","description":"**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.","severity":"critical","score":9.3,"published":"2025-06-04T20:31:39.000Z","modified":"2026-02-04T04:39:22.262Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"auth0/auth0-php","ranges":[{"events":[{"introduced":"8.0.0-BETA3"},{"fixed":"8.3.1"}],"type":"ECOSYSTEM"}],"versions":["8.0.0","8.0.0-BETA3","8.0.1","8.0.2","8.0.3","8.0.4","8.0.5","8.0.6","8.1.0","8.2.0","8.2.1","8.3.0"],"fixed":["8.3.1"]}],"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/auth0-PHP/commit/04b1f5daa8bdfebc5e740ec5ca0fb2df1648a715","https://github.com/auth0/auth0-PHP"],"sources":[{"name":"OSV","id":"GHSA-v9m8-9xxp-q492","modified":"2026-02-04T04:39:22.262305Z","url":"https://osv.dev/vulnerability/GHSA-v9m8-9xxp-q492"}],"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}]}