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…

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.

Scores

EPSS (exploitation in 30 days)

1.5% · top 25% of all CVEs (5 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.

Weakness

• Cross-Site Scripting
• CWE-79 (opens in a new tab)All about CWE-79 and its CVEs

Affected products

• Wikimedia Foundation · MediaWiki

  • affected 1.19.x before 1.19.8
  • affected 1.20.x before 1.20.7
  • affected and 1.21.x before 1.21.2

References (5)

• http://lists.wikimedia.org/pipermail/mediawiki-announce/2013-September/000133.html (opens in a new tab)x_refsource_MISCx_transferred
• http://seclists.org/oss-sec/2013/q3/553 (opens in a new tab)x_refsource_MISCx_transferred
• https://bugzilla.wikimedia.org/show_bug.cgi?id=52746 (opens in a new tab)x_refsource_MISCx_transferred
• http://www.securityfocus.com/bid/62194 (opens in a new tab)x_refsource_MISCx_transferred
• https://exchange.xforce.ibmcloud.com/vulnerabilities/86897 (opens in a new tab)x_refsource_MISCx_transferred

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2013-4303](https://trackcve.app/badge/CVE-2013-4303.svg)](https://trackcve.app/cve/CVE-2013-4303)

Record last updated 6 Aug 2024, 16:38 UTC.