CVE-2013-4567 Cross-site scripting in n/a

Medium 4.3 Published 13 Dec 2013 Updated 6 Aug 2024

Remote attackers can execute cross-site scripting attacks in MediaWiki by injecting backspace characters into CSS, bypassing sanitization filters.

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-2013-4567?

CVE-2013-4567 is a medium-severity cross-site scripting vulnerability in Mediawiki Mediawiki, published on 13 Dec 2013. 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

Incomplete blacklist vulnerability in Sanitizer::checkCss in MediaWiki before 1.19.9, 1.20.x before 1.20.8, and 1.21.x before 1.21.3 allows remote attackers to conduct cross-site scripting (XSS) attacks via a \b (backspace) character in CSS.

Which versions are affected by CVE-2013-4567?

It affects 1 product.

Products include Mediawiki Mediawiki.

How do I fix CVE-2013-4567?

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-2013-4567 being exploited?

There is no known exploitation of CVE-2013-4567 in the wild and no public exploit code.

All Mediawiki Mediawiki vulnerabilities

Sources

Also known as DEBIAN-CVE-2013-4567, GHSA-r328-753q-m689.