CVE-2013-4303: vulnerability in Wikimedia Foundation MediaWiki
Published · Updated
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 1.5%
exploitation probability
1.5%top 26% of all CVEs
observed exploitation
nono source reports it
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.
Affected products
Wikimedia Foundation · MediaWikiRelated CVEs — Wikimedia Foundation MediaWiki
In the same product, most dangerous first.
CVE-2013-4572—CVE-2013-4572EPSS 2.1%CVE-2013-6455—CVE-2013-6455EPSS 1.1%CVE-2013-6451—CVE-2013-6451EPSS 1.1%CVE-2025-6597NONEMediaWiki should not consider autocreation as login for the purposes of security reauthenticationEPSS 0.5%CVE-2025-6927LOWAutoblocks from global account suppressions are publicly visibleEPSS 0.5%CVE-2026-58025MEDIUMRemote Code Execution via Unsafe Deserialization in LogItem ImportEPSS 0.5%