{"id":"CVE-2021-43558","aliases":["BIT-moodle-2021-43558","EUVD-2021-2406","GHSA-wpfp-q843-v772","UBUNTU-CVE-2021-43558"],"status":"published","title":"Cross-site Scripting in moodle","description":"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.","severity":{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.00873,"percentile":0.59343,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-79"],"published":"2021-11-22T15:59:46Z","modified":"2026-10-24T10:31:06Z","fixes":[{"ecosystem":"Packagist","package":"moodle/moodle","fixed_in":["3.11.4","3.10.8","3.9.11"],"sources":["ghsa","osv"]},{"ecosystem":"Bitnami","package":"moodle","fixed_in":["3.8.9","3.9.11","3.10.8","3.11.4"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.11.0"},{"fixed":"3.11.4"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.10.0"},{"fixed":"3.10.8"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.9.0"},{"fixed":"3.9.11"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"moodle","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.8.9"},{"introduced":"3.9.0"},{"fixed":"3.9.11"},{"introduced":"3.10.0"},{"fixed":"3.10.8"},{"introduced":"3.11.0"},{"fixed":"3.11.4"}]}]},{"source":"osv","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.11.0"},{"fixed":"3.11.4"}]}],"versions":["v3.11.0","v3.11.1","v3.11.2","v3.11.3"]},{"source":"osv","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.10.0"},{"fixed":"3.10.8"}]}],"versions":["v3.10.0","v3.10.1","v3.10.2","v3.10.3","v3.10.4","v3.10.5","v3.10.6","v3.10.7"]},{"source":"osv","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.9.0"},{"fixed":"3.9.11"}]}],"versions":["v3.9.0","v3.9.1","v3.9.10","v3.9.2","v3.9.3","v3.9.4","v3.9.5","v3.9.6","v3.9.7","v3.9.8","v3.9.9"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"moodle","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","3.0.3+dfsg-0ubuntu1+esm1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.3+dfsg-0ubuntu1","3.0.3+dfsg-0ubuntu1+esm1"]}],"products":[{"vendor":"fedoraproject","product":"extra_packages_for_enterprise_linux"},{"vendor":"fedoraproject","product":"fedora"},{"vendor":"moodle","product":"moodle"}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2021515","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","advisory","report","web"]},{"url":"https://moodle.org/mod/forum/discuss.php?d=429097","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory","advisory","fix","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43558","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-wpfp-q843-v772"},{"url":"https://github.com/moodle/moodle","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2021-43558","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-43558","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-43558","description":"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.","status":"published","published":"2021-11-22T15:59:46Z","modified":"2024-08-04T04:03:07.933Z","cwes":["CWE-79"],"updated_at":"2026-11-02T14:32:56.689433Z"}],"euvd":[{"id":"EUVD-2021-2406","description":"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.","status":"published","published":"2021-11-22T15:59:46Z","modified":"2024-08-04T04:03:07Z","updated_at":"2026-11-03T03:24:13.772922Z"}],"ghsa":[{"id":"GHSA-wpfp-q843-v772","title":"Cross-site Scripting in moodle","description":"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.","status":"published","published":"2021-11-23T00:00:51Z","modified":"2023-01-27T05:00:35Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:36:14.825433Z"}],"nvd":[{"id":"CVE-2021-43558","description":"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.","status":"published","published":"2021-11-22T16:15:08.237Z","modified":"2026-06-17T04:11:08.023Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T14:07:01.428028Z"}],"osv":[{"id":"CVE-2021-43558","description":"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.","status":"published","published":"2021-11-22T16:15:08.237Z","modified":"2026-10-24T10:31:06.307410249Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:21.877444Z"},{"id":"GHSA-wpfp-q843-v772","title":"Cross-site Scripting in moodle","description":"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.","status":"published","published":"2021-11-23T00:00:51Z","modified":"2023-12-06T01:01:39.649461Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"cwes":["CWE-79"],"updated_at":"2026-11-02T15:46:58.767335Z"},{"id":"UBUNTU-CVE-2021-43558","description":"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.","status":"published","published":"2021-11-22T16:15:00Z","modified":"2026-09-23T18:46:10.242761371Z","cvss":[{"version":"3.1","score":6.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:29.220315Z"},{"id":"BIT-moodle-2021-43558","description":"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.","status":"published","published":"2024-03-06T11:06:48.379Z","modified":"2026-09-08T08:48:14.903054881Z","updated_at":"2026-11-02T15:28:33.469426Z"}]}}