CVE-2013-4303 Cross-site scripting in MediaWiki

What is CVE-2013-4303?

CVE-2013-4303 is a medium-severity cross-site scripting vulnerability in Mediawiki Mediawiki, published on 11 Dec 2019. 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

includes/libs/IEUrlExtension.php in the MediaWiki API in MediaWiki 1.19.x before 1.19.8, 1.20.x before 1.20.7, and 1.21.x before 1.21.2 does not properly detect extensions when there are an even number of "." (period) characters in a string, which allows remote attackers to conduct cross-site scripting (XSS) attacks via the siprop parameter in a query action to wiki/api.php.

Weakness: CWE-79

Which versions are affected by CVE-2013-4303?

It affects 1 product.

Products include Mediawiki Mediawiki.

How do I fix CVE-2013-4303?

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-2013-4303 being exploited?

There is no known exploitation of CVE-2013-4303 in the wild and no public exploit code.

Other vulnerabilities in Mediawiki Mediawiki

• CVE-2023-37303 Denial of service in n/a Critical 9.8
• CVE-2022-29904 SQL injection in n/a Critical 9.8
• CVE-2022-29906 Missing authorization in n/a Critical 9.8
• CVE-2022-28205 Business logic in n/a Critical 9.8
• CVE-2022-28206 Missing authorization in n/a Critical 9.8

All Mediawiki Mediawiki vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2013-4303, GHSA-rxq7-cw42-v5ch.