Stored cross-site scripting in Moodle - CVE-2021-36399
Published: July 19, 2021
Vulnerability identifier: #VU54983
CSH Severity: Low
CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N]
CVE-ID: CVE-2021-36399
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The disclosed vulnerability allows a remote user to perform cross-site scripting (XSS) attacks.
The vulnerability exists due to insufficient sanitization of user-supplied data passed via the user ID number to quiz override screens. A remote user can inject and execute arbitrary HTML and script code in user's browser in context of vulnerable website.
Affected software
Moodle
How to mitigate CVE-2021-36399
Install updates from vendor's website.
Moodle - update to 3.11.1