{"id":"CVE-2018-7644","details":"The XmlSecLibs library as used in the saml2 library in SimpleSAMLphp before 1.15.3 incorrectly verifies signatures on SAML assertions, allowing a remote attacker to construct a crafted SAML assertion on behalf of an Identity Provider that would pass as cryptographically valid, thereby allowing them to impersonate a user from that Identity Provider, aka a key confusion issue.","aliases":["GHSA-923w-2xv2-7pr8"],"modified":"2026-04-11T18:10:47.792934Z","published":"2018-03-05T14:29:00.377Z","references":[{"type":"ADVISORY","url":"https://simplesamlphp.org/security/201802-01"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/simplesamlphp/simplesamlphp","events":[{"introduced":"0"},{"fixed":"1cba48676420d7889ba8223d4f2ea1b9867c0184"}],"database_specific":{"cpe":"cpe:2.3:a:simplesamlphp:simplesamlphp:*:*:*:*:*:*:*:*","source":"CPE_FIELD","extracted_events":[{"introduced":"0"},{"fixed":"1.15.3"}]}}],"versions":["v1.12.0","v1.15.0","v1.15.0-rc1","v1.15.0-rc2","v1.15.0-rc3","v1.15.1","v1.15.2"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-7644.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N"}]}