Medium severity · published Dec 11, 2019
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 does not properly detect extensions when…
6.1
CVSS
1.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.5% · higher than 75% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ME
Mediawiki · Mediawiki
1.19.0 before 1.19.8; 1.20.0 before 1.20.7; 1.21.0 before 1.21.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2013-4303
CVE.org
https://www.cve.org/CVERecord?id=CVE-2013-4303
Mailing List
http://lists.wikimedia.org/pipermail/mediawiki-announce/2013-September/000133.html
Mailing List
http://seclists.org/oss-sec/2013/q3/553
Third Party Advisory
http://www.securityfocus.com/bid/62194
Exploit
https://bugzilla.wikimedia.org/show_bug.cgi?id=52746
Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/86897
More from Mediawiki
9.8
CVE-2026-58025
Remote Code Execution via Unsafe Deserialization in LogItem Import
9.8
CVE-2025-67484
Action API xslt option allows JavaScript execution by administrators who are not interface administrators
9.8
CVE-2024-34502
An issue was discovered in WikibaseLexeme in MediaWiki before 1.39.6, 1.40.x before 1.40.2, and 1.41.x before 1.41.1
9.8
CVE-2023-37303
An issue was discovered in the CheckUser extension for MediaWiki through 1.39.3
9.8
CVE-2023-29141
An issue was discovered in MediaWiki before 1.35.10, 1.36.x through 1.38.x before 1.38.6, and 1.39.x before 1.39.3