CVE-2021-21809

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.

CVSS v3.1

9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1

9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS v3.0

8.2 HIGHCVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:L/A:L

CVSS v2.0

9.0 HIGHAV:N/AC:L/Au:S/C:C/I:C/A:C

EPSS

24.17% chance of exploitation in the next 30 days, 98th percentile

Published

2021-06-23

Updated

2024-08-03

Proof-of-concept exploits (3)

• http://packetstormsecurity.com/files/164481/Moodle-SpellChecker-Path-Authenticated-Remote…
• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1277
• anldori/CVE-2021-218091★ · 2022-12-20

Metasploit modules (1)

• rapid7/metasploit-framework/blob/master/modules/exploits/multi/http/moodle_spelling_path_…

References

• CVE Record
• NVD entry

Related

• CVE-2017-16995
• CVE-2017-7308
• CVE-2017-9833
• CVE-2018-7600
• CVE-2021-33558
• CVE-2021-21808