CVE-2016-6334 Cross-site scripting in n/a
Remote attackers can inject arbitrary web script or HTML into MediaWiki pages via unclosed internal links, potentially compromising user sessions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2016-6334?
CVE-2016-6334 is a medium-severity cross-site scripting vulnerability in Mediawiki Mediawiki, published on 20 Apr 2017. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Cross-site scripting (XSS) vulnerability in the Parser::replaceInternalLinks2 method in MediaWiki before 1.23.15, 1.26.x before 1.26.4, and 1.27.x before 1.27.1 allows remote attackers to inject arbitrary web script or HTML via vectors involving replacement of percent encoding in unclosed internal links.
Weakness: CWE-79
Which versions are affected by CVE-2016-6334?
It affects 1 product.
Products include Mediawiki Mediawiki.
How do I fix CVE-2016-6334?
Upgrade to a fixed version.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2016-6334 being exploited?
There is no known exploitation of CVE-2016-6334 in the wild and no public exploit code.
Other vulnerabilities in Mediawiki Mediawiki
Sources
Also known as DEBIAN-CVE-2016-6334, GHSA-9276-9qp2-vqp8.