#VU41982 Cross-site scripting in MediaWiki - CVE-2014-2244

Vulnerability identifier: #VU41982

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: CVE-2014-2244

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MediaWiki
Web applications / CMS

Vendor: MediaWiki.org

Description

Vulnerability allows a remote attacker to perform XSS attacks.

The vulnerability is caused by an input validation error in the formatHTML function in includes/api/ApiFormatBase.php in MediaWiki before 1.19.12, 1.20.x and 1.21.x before 1.21.6, and 1.22.x before 1.22.3. A remote 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

MediaWiki: 1.1.0 - 1.19.10, 1.20 - 1.22.2

---

External links
https://lists.wikimedia.org/pipermail/mediawiki-announce/2014-February/000141.html
https://openwall.com/lists/oss-security/2014/02/28/1
https://openwall.com/lists/oss-security/2014/03/01/2
https://www.securityfocus.com/bid/65906
https://bugzilla.redhat.com/show_bug.cgi?id=1071139
https://bugzilla.wikimedia.org/show_bug.cgi?id=61362
https://gerrit.wikimedia.org/r/#/q/Idf985e4e69c2f11778a8a90503914678441cb3fb,n,z

---

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.