{"id":"UBUNTU-CVE-2021-43558","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. A URL parameter in the filetype site administrator tool required extra sanitizing to prevent a reflected XSS risk.","modified":"2025-10-24T04:50:37Z","published":"2021-11-22T16:15:00Z","upstream":["CVE-2021-43558"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-43558"},{"type":"REPORT","url":"https://moodle.org/mod/forum/discuss.php?d=429097"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2021515"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-43558"}],"affected":[{"package":{"name":"moodle","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/moodle@3.0.3+dfsg-0ubuntu1?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.7.9+dfsg-1","2.7.10+dfsg-1","2.7.11+dfsg-1","2.7.11+dfsg-2","2.7.12+dfsg-1","3.0.3+dfsg-0ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.0.3+dfsg-0ubuntu1","binary_name":"moodle"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43558.json"}},{"package":{"name":"moodle","ecosystem":"Ubuntu:18.04:LTS","purl":"pkg:deb/ubuntu/moodle@3.0.3+dfsg-0ubuntu1?arch=source&distro=bionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.3+dfsg-0ubuntu1"],"ecosystem_specific":{"binaries":[{"binary_name":"moodle","binary_version":"3.0.3+dfsg-0ubuntu1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-43558.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"},{"type":"Ubuntu","score":"medium"}]}