{"id":"CVE-2017-12870","aliases":["GHSA-44pr-mgcp-v36r"],"url":"https://o3.security/vulnerability/CVE-2017-12870","summary":"SimpleSAMLphp Unauthenticated encryption in CBC mode","details":"SimpleSAMLphp 1.14.12 and earlier make it easier for man-in-the-middle attackers to obtain sensitive information by leveraging use of the aesEncrypt and aesDecrypt methods in the SimpleSAML/Utils/Crypto class to protect session identifiers in replies to non-HTTPS service providers.","published":"2017-09-01T13:29:00.333Z","modified":"2026-07-08T11:35:11.070366Z","cvss":{"score":5.9,"severity":"MEDIUM","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"simplesamlphp/simplesamlphp","fixedVersion":"1.14.13"}],"fix":{"url":"https://github.com/simplesamlphp/simplesamlphp/commit/4c939be1696bacb2b95ee11d4ebc5814a08b04c5","label":"simplesamlphp/simplesamlphp@4c939be"},"references":[{"type":"FIX","url":"https://simplesamlphp.org/security/201704-01"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2017-12870"},{"type":"WEB","url":"https://github.com/simplesamlphp/simplesamlphp/commit/4c939be1696bacb2b95ee11d4ebc5814a08b04c5"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/simplesamlphp/simplesamlphp/CVE-2017-12870.yaml"},{"type":"PACKAGE","url":"https://github.com/simplesamlphp/simplesamlphp"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T11:35:11.070366Z"}}