vulnerability
Moodle: Improper Neutralization of Special Elements used in an OS Command (CVE-2021-21809)
| Severity | CVSS | Published | Added | Modified |
|---|---|---|---|---|
| 9 | (AV:N/AC:L/Au:S/C:C/I:C/A:C) | Jun 23, 2021 | Jul 8, 2021 | May 7, 2026 |
Severity
9
CVSS
(AV:N/AC:L/Au:S/C:C/I:C/A:C)
Published
Jun 23, 2021
Added
Jul 8, 2021
Modified
May 7, 2026
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.
Solution
moodle-upgrade-latest
References
- CVE-2021-21809
- https://attackerkb.com/topics/CVE-2021-21809
- http://packetstormsecurity.com/files/164481/Moodle-SpellChecker-Path-Authenticated-Remote-Command-Execution.html
- https://talosintelligence.com/vulnerability_reports/TALOS-2021-1277
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2022-3528
- CWE-78
- EUVD-EUVD-2022-3528
Rapid7 Labs
2026 Global Threat Landscape Report
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