#VU41238 Cross-site scripting in MediaWiki - CVE-2014-7295

Vulnerability identifier: #VU41238

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-2014-7295

CWE-ID: CWE-79

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
MediaWiki
Web applications / CMS

Vendor: MediaWiki.org

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data passed via "The (1) Special:Preferences and (2) Special:UserLogin pages" when modifying MediaWiki:Common.css. A remote attacker can trick the victim to follow a specially crafted link and execute arbitrary HTML and script code in user's browser in 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: 1.19 - 1.19.18, 1.22.0 - 1.23.4

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External links
https://seclists.org/oss-sec/2014/q4/67
https://secunia.com/advisories/61752
https://www.debian.org/security/2014/dsa-3046
https://www.securityfocus.com/bid/70238
https://bugzilla.wikimedia.org/show_bug.cgi?id=70672
https://lists.wikimedia.org/pipermail/mediawiki-announce/2014-October/000163.html

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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.