Cross-site scripting in Moodle - CVE-2013-4523
Published: November 26, 2013 / Updated: January 16, 2023
Vulnerability identifier: #VU42311
CSH Severity: Low
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2013-4523
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
Vulnerability allows a remote attacker to perform Cross-site scripting attacks.
An input validation error exists in message/lib.php in Moodle through 2.2.11, 2.3.x before 2.3.10, 2.4.x before 2.4.7, and 2.5.x before 2.5.3. A remote authenticated attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in victim's browser in security context of vulnerable website.
Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.
Affected software
Moodle
How to mitigate CVE-2013-4523
Install update from vendor's website.
Moodle - addressed in versions 2.3.10, 2.4.7, 2.5.3