CVE-2013-4303
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…
- 6.1MediumCVSS base score
- 1.5%Exploitation in 30 daysEPSS · top 25% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By redhat
- 7 years later
· 7 years later
Published
- 5 years later
· 5 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
- EPSS (exploitation in 30 days)
- 1.5% · top 25% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.1.
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)
- EUVD EUVD-2013-4197 (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
[](https://cveledger.app/cve/CVE-2013-4303)Record last updated .