#VU42311 Cross-site scripting in Moodle - CVE-2013-4523
Vulnerability identifier: #VU42311
Vulnerability risk: Low
CVSSv4.0: 2.7 [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/E:U/U:Clear]
CVE-ID:
CWE-ID:
CWE-79
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
Moodle
Web applications /
Other software
Vendor: moodle.org
Description
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.
Mitigation
Install update from vendor's website.
Vulnerable software versions
Moodle: 1.1.1, 1.2 - 1.2.1, 1.3 - 1.3.4, 1.4.1 - 1.4.5, 1.5 - 1.5.3, 1.6 - 1.6.8, 1.7 - 1.7.6, 1.8 - 1.8.14, 1.9 - 1.9.18, 2.0 - 2.0.9, 2.1 - 2.1.10, 2.2 - 2.2.10, 2.3 - 2.3.9, 2.4 - 2.4.6, 2.5 - 2.5.2
External links
https://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-41941
https://openwall.com/lists/oss-security/2013/11/25/1
https://moodle.org/mod/forum/discuss.php?d=244480
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
