{"id":"CVE-2021-43560","aliases":["BIT-moodle-2021-43560","GHSA-g39c-mccf-rxjv"],"url":"https://o3.security/vulnerability/CVE-2021-43560","summary":"Moodle Insecure direct object reference (IDOR) in a calendar web service","details":"A flaw was found in Moodle in versions 3.11 to 3.11.3, 3.10 to 3.10.7, 3.9 to 3.9.10 and earlier unsupported versions. Insufficient capability checks made it possible to fetch other users' calendar action events.","published":"2021-11-22T16:15:08.337Z","modified":"2026-07-08T06:00:01.777076209Z","cvss":{"score":5.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"moodle/moodle","fixedVersion":"3.9.11"},{"ecosystem":"Packagist","name":"moodle/moodle","fixedVersion":"3.10.8"},{"ecosystem":"Packagist","name":"moodle/moodle","fixedVersion":"3.11.4"}],"fix":null,"references":[{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2021519"},{"type":"FIX","url":"https://moodle.org/mod/forum/discuss.php?d=429100"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43560"},{"type":"PACKAGE","url":"https://github.com/moodle/moodle"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T06:00:01.777076209Z"}}