Code Injection in Moodle - CVE-2021-36394
Published: July 19, 2021 / Updated: September 8, 2023
Vulnerability identifier: #VU54978
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-36394
CWE-ID: CWE-94
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to improper input validation in Shibboleth authentication plugin. A remote attacker can send a specially crafted request and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
Affected software
Moodle
How to mitigate CVE-2021-36394
Install updates from vendor's website.
Moodle - addressed in versions 3.9.8, 3.10.5, 3.11.1