{"id":"CVE-2021-20281","aliases":["BIT-moodle-2021-20281","EUVD-2021-0636","GHSA-93wh-35r4-6qmw","UBUNTU-CVE-2021-20281"],"status":"published","title":"Moodle allowed some users without permission to view other users' full names","description":"It was possible for some users without permission to view other users' full names to do so via the online users block in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01361,"percentile":0.71972,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-200","CWE-863"],"published":"2021-03-15T21:35:50Z","modified":"2026-10-24T10:30:21Z","fixes":[{"ecosystem":"Packagist","package":"moodle/moodle","fixed_in":["3.10.2","3.9.5","3.8.8","3.5.17"],"sources":["ghsa","osv"]},{"ecosystem":"Bitnami","package":"moodle","fixed_in":["3.5.17","3.8.8","3.9.5","3.10.2"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.10.0"},{"fixed":"3.10.2"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.9.0"},{"fixed":"3.9.5"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.8.0"},{"fixed":"3.8.8"}]}]},{"source":"ghsa","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.5"},{"fixed":"3.5.17"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"moodle","ranges":[{"type":"SEMVER","events":[{"introduced":"3.5.0"},{"fixed":"3.5.17"},{"introduced":"3.8.0"},{"fixed":"3.8.8"},{"introduced":"3.9.0"},{"fixed":"3.9.5"},{"introduced":"3.10.0"},{"fixed":"3.10.2"}]}]},{"source":"osv","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.10.0"},{"fixed":"3.10.2"}]}],"versions":["v3.10.0","v3.10.1"]},{"source":"osv","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.9.0"},{"fixed":"3.9.5"}]}],"versions":["v3.9.0","v3.9.1","v3.9.2","v3.9.3","v3.9.4"]},{"source":"osv","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.8.0"},{"fixed":"3.8.8"}]}],"versions":["v3.8.0","v3.8.1","v3.8.2","v3.8.3","v3.8.4","v3.8.5","v3.8.6","v3.8.7"]},{"source":"osv","ecosystem":"Packagist","package":"moodle/moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.5"},{"fixed":"3.5.17"}]}],"versions":["v3.5.0","v3.5.0-beta","v3.5.0-rc1","v3.5.1","v3.5.10","v3.5.11","v3.5.12","v3.5.13","v3.5.14","v3.5.15","v3.5.16","v3.5.2","v3.5.3","v3.5.4","v3.5.5","v3.5.6","v3.5.7","v3.5.8","v3.5.9"]},{"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":"fedora"},{"vendor":"moodle","product":"moodle"}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1939041","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","advisory","report","web"]},{"url":"https://moodle.org/mod/forum/discuss.php?d=419652","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory","advisory","fix","web","report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AFSNJ7XHVTC52RSRX2GBQFF3VEEAY2MS/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UFH5DDMU5TZ3JT4Q52WMRAHACA5MHIMT/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-20281","tags":["web","advisory"]},{"url":"https://github.com/moodle/moodle/commit/33d6017287e1835513a3de8edd3fbf7a6a90af9c","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AFSNJ7XHVTC52RSRX2GBQFF3VEEAY2MS/"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UFH5DDMU5TZ3JT4Q52WMRAHACA5MHIMT/"},{"url":"https://github.com/advisories/GHSA-93wh-35r4-6qmw"},{"url":"https://github.com/moodle/moodle","tags":["package"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/AFSNJ7XHVTC52RSRX2GBQFF3VEEAY2MS","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UFH5DDMU5TZ3JT4Q52WMRAHACA5MHIMT","tags":["web"]},{"url":"https://ubuntu.com/security/CVE-2021-20281","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-20281","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-20281","description":"It was possible for some users without permission to view other users' full names to do so via the online users block in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.","status":"published","published":"2021-03-15T21:35:50Z","modified":"2024-08-03T17:37:23.634Z","cwes":["CWE-200"],"updated_at":"2026-11-02T14:32:55.564736Z"}],"euvd":[{"id":"EUVD-2021-0636","description":"It was possible for some users without permission to view other users' full names to do so via the online users block in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.","status":"published","published":"2021-03-15T21:35:50Z","modified":"2024-08-03T17:37:23Z","updated_at":"2026-11-03T03:25:09.355483Z"}],"ghsa":[{"id":"GHSA-93wh-35r4-6qmw","title":"Moodle allowed some users without permission to view other users' full names","description":"It was possible for some users without permission to view other users' full names to do so via the online users block in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.","status":"published","published":"2021-03-29T20:43:23Z","modified":"2023-09-13T12:57:12Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-200","CWE-863"],"updated_at":"2026-11-02T14:37:05.004935Z"}],"nvd":[{"id":"CVE-2021-20281","description":"It was possible for some users without permission to view other users' full names to do so via the online users block in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.","status":"published","published":"2021-03-15T22:15:13.25Z","modified":"2026-06-17T03:33:36.04Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-200","CWE-863"],"updated_at":"2026-11-02T14:06:50.805771Z"}],"osv":[{"id":"CVE-2021-20281","description":"It was possible for some users without permission to view other users' full names to do so via the online users block in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.","status":"published","published":"2021-03-15T22:15:13.25Z","modified":"2026-10-24T10:30:21.355374576Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:18.004149Z"},{"id":"GHSA-93wh-35r4-6qmw","title":"Moodle allowed some users without permission to view other users' full names","description":"It was possible for some users without permission to view other users' full names to do so via the online users block in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.","status":"published","published":"2021-03-29T20:43:23Z","modified":"2024-02-17T05:22:55.522016Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-200","CWE-863"],"updated_at":"2026-11-02T15:46:43.123867Z"},{"id":"UBUNTU-CVE-2021-20281","description":"It was possible for some users without permission to view other users' full names to do so via the online users block in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.","status":"published","published":"2021-03-15T22:15:00Z","modified":"2026-09-23T18:46:09.311483239Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:25.728622Z"},{"id":"BIT-moodle-2021-20281","description":"It was possible for some users without permission to view other users' full names to do so via the online users block in moodle before 3.10.2, 3.9.5, 3.8.8, 3.5.17.","status":"published","published":"2024-03-06T11:10:54.174Z","modified":"2026-09-08T08:48:14.736286981Z","updated_at":"2026-11-02T15:28:33.469426Z"}]}}