{"action":"Upgrade simplesamlphp/saml2-legacy to 4.17.0 or later.","affected":[{"fixed":"4.17.0","introduced":"0"}],"component":"simplesamlphp/saml2-legacy","cve_ids":["CVE-2025-27773"],"ecosystem":"Packagist","epss":0.00415,"exploited":false,"fixed_versions":["4.17.0"],"ghsa_id":"GHSA-46r4-f8gj-xg56","id":"tcs_01M5KETQHN4NEW7FPBEX6NPXFT","modified_at":"2026-09-10T03:50:56.811522448Z","published_at":"2025-03-11T19:23:22Z","references":["https://osv.dev/vulnerability/GHSA-46r4-f8gj-xg56","https://github.com/simplesamlphp/saml2/security/advisories/GHSA-46r4-f8gj-xg56","https://nvd.nist.gov/vuln/detail/CVE-2025-27773","https://github.com/simplesamlphp/saml2/commit/7867d6099dc7f31bed1ea10e5bea159c5623d2a0","https://github.com/simplesamlphp/saml2","https://github.com/simplesamlphp/saml2/blob/9545abd0d9d48388f2fa00469c5c1e0294f0303e/src/SAML2/HTTPRedirect.php#L104-L113","https://github.com/simplesamlphp/saml2/blob/9545abd0d9d48388f2fa00469c5c1e0294f0303e/src/SAML2/HTTPRedirect.php#L178-L217","https://lists.debian.org/debian-lts-announce/2025/05/msg00013.html"],"severity":{"label":"high","score":8.6},"sources":[{"source":"osv","source_id":"GHSA-46r4-f8gj-xg56#Packagist/simplesamlphp/saml2-legacy","url":"https://osv.dev/vulnerability/GHSA-46r4-f8gj-xg56"}],"summary":"The SimpleSAMLphp SAML2 library incorrectly verifies signatures for HTTP-Redirect binding"}