VULNERABILITY INTELLIGENCE

CVE-2021-21809

CVSS score9.1 CRITICAL

EPSS probability24.17%

CISA KEVNot currently listed

Published2021-06-23

Last modified2026-06-17

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Description

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.

Weakness classification

nvd@nist.gov: CWE-78

Primary references

talos-cna@cisco.com — Exploit, Third Party Advisory, VDB Entry
talos-cna@cisco.com — Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory