#VU54334 OS Command Injection in Moodle - CVE-2021-21809

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Main Vulnerability Database Vulnerabilities #VU54334

#VU54334 OS Command Injection in Moodle - CVE-2021-21809

Published: June 23, 2021 / Updated: January 9, 2023


Vulnerability identifier: #VU54334
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Clear
CVE-ID: CVE-2021-21809
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability: Public exploit is available
Vulnerable software:
Moodle
Software vendor:
moodle.org

Description

The vulnerability allows a remote user to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation in the default legacy spellchecker plugin. A remote administrator can pass specially crafted data to the application and execute arbitrary OS commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.


Remediation

Install updates from vendor's website.

External links