{"id":"CVE-2021-42567","aliases":["GHSA-gfhx-jjwq-63gv"],"url":"https://o3.security/vulnerability/CVE-2021-42567","summary":"Cross-site Scripting in Apereo CAS","details":"Apereo CAS through 6.4.1 allows XSS via POST requests sent to the REST API endpoints.","published":"2021-12-07T22:15:06.907Z","modified":"2026-07-09T06:02:04.668739Z","cvss":{"score":6.1,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.apereo.cas:cas-server-core-web","fixedVersion":"6.4.2"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/apereo/cas/releases"},{"type":"FIX","url":"https://apereo.github.io/2021/10/18/restvuln/"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-09T06:02:04.668739Z"}}