CVE-2021-21809
Moodle command execution vulnerability exists in the default legacy spellchecker plugin
9.1
CRITICAL
CVSS 3.1
EPSS 72.9%
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.
How to fix CVE-2021-21809
To remediate CVE-2021-21809, upgrade the affected package to a fixed version below.
- —upgrade to 3.10.1 or later
- —no fix listed
Is CVE-2021-21809 being exploited?
Likely — EPSS is 72.9%, placing CVE-2021-21809 in the top tier of vulnerabilities by exploitation probability. Prioritise patching.
Affected packages (2)
- >= 3.10.0, < 3.10.1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.1 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |