{"id":"CVE-2021-21809","details":"A command execution vulnerability exists in the default legacy spellchecker plugin in Moodle 3.10. A specially crafted series of HTTP requests can lead to command execution. An attacker must have administrator privileges to exploit this vulnerabilities.","aliases":["BIT-moodle-2021-21809","GHSA-c7jj-vfmr-j9mj"],"modified":"2026-07-09T01:30:10.685591Z","published":"2021-06-23T22:15:08.407Z","references":[{"type":"EVIDENCE","url":"http://packetstormsecurity.com/files/164481/Moodle-SpellChecker-Path-Authenticated-Remote-Command-Execution.html"},{"type":"EVIDENCE","url":"https://talosintelligence.com/vulnerability_reports/TALOS-2021-1277"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/moodle/moodle","events":[{"introduced":"ec58cefefb2722f61f77c9a2b6a12d40a8c078a0"},{"last_affected":"ec58cefefb2722f61f77c9a2b6a12d40a8c078a0"}],"database_specific":{"cpe":"cpe:2.3:a:moodle:moodle:3.10.0:-:*:*:*:*:*:*","extracted_events":[{"introduced":"3.10.0-NA"},{"last_affected":"3.10.0-NA"}],"source":"CPE_STRING"}}],"versions":["3.10.0-NA","v3.10.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-21809.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H"}]}