{"id":"CVE-2023-5539","aliases":["BIT-moodle-2023-5539","GHSA-3xxm-3g3c-w579"],"url":"https://o3.security/vulnerability/CVE-2023-5539","summary":"Moodle: authenticated remote code execution risk in lesson","details":"A remote code execution risk was identified in the Lesson activity. By default this was only available to teachers and managers.","published":"2023-11-09T19:11:06.859Z","modified":"2026-08-12T03:51:43.867759150Z","cvss":{"score":4.7,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L"},"epss":{"score":0.01862,"percentile":0.78186,"asOf":"2026-09-16"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Packagist","name":"moodle/moodle","fixedVersion":"4.3.0-rc2"}],"fix":null,"references":[{"type":"WEB","url":"http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-79408"},{"type":"WEB","url":"https://git.moodle.org"},{"type":"WEB","url":"https://moodle.org/mod/forum/discuss.php?d=451580"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/5xxx/CVE-2023-5539.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-5539"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2243352"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:43.867759150Z"}}