CVE-2013-6451

Cross-site scripting (XSS) vulnerability in MediaWiki 1.19.9 before 1.19.10, 1.2x before 1.21.4,...

6.1 MediumFix available

Cross-site scripting (XSS) vulnerability in MediaWiki 1.19.9 before 1.19.10, 1.2x before 1.21.4, and 1.22.x before 1.22.1 allows remote attackers to inject arbitrary web script or HTML via unspecified CSS values.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Required

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

1.08%Unchanged since Feb 4, 2022

What each source reports

NVD Score used 6.1

Record: CVE-2013-6451
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS 2.0: 4.3 MediumAV:N/AC:M/Au:N/C:N/I:P/A:N
Weakness: CWE-79
Updated: 2026-11-02

CVE List No score

Record: CVE-2013-6451
Updated: 2026-11-02

EUVDEUVD-2013-6258 No score

Record: EUVD-2013-6258
Updated: 2026-11-03

GitHub AdvisoriesGHSA-423m-g5gq-97wq No score

Cross-site scripting (XSS) vulnerability in MediaWiki 1.19.9 before 1.19.10, 1.2x before 1.21.4,...

Record: GHSA-423m-g5gq-97wq
Updated: 2026-11-02

OSV 6.1

Record: CVE-2013-6451
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

OSVDEBIAN-CVE-2013-6451 6.1

Record: DEBIAN-CVE-2013-6451
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2013-6451 6.1

Record: UBUNTU-CVE-2013-6451
CVSS 3.1: 6.1 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Updated: 2026-11-02

OSVMGASA-2014-0113 No score

Updated mediawiki packages fix security vulnerabilities

MediaWiki user Michael M reported that the fix for CVE-2013-4568 allowed insertion of escaped CSS values which could pass the CSS validation checks, resulting in XSS (CVE-2013-6451).

Chris from RationalWiki reported that SVG files could be uploaded that include external stylesheets, which could lead to XSS when an XSL was used to include JavaScript (CVE-2013-6452).

During internal review, it was discovered that MediaWiki's SVG sanitization could be bypassed when the XML was considered invalid (CVE-2013-6453).

During internal review, it was discovered that MediaWiki displayed some information about deleted pages in the log API, enhanced RecentChanges, and user watchlists (CVE-2013-6472).

Netanel Rubin from Check Point discovered a remote code execution vulnerability in MediaWiki's thumbnail generation for DjVu files. Internal review also discovered similar logic in the PdfHandler extension, which could be exploited in a similar way (CVE-2014-1610).

MediaWiki has been updated to version 1.22.2, which fixes these issues, as well as several others.

Also, the mediawiki-ldapauthentication and mediawiki-math extensions have been updated to newer versions that are compatible with MediaWiki 1.22.

Additionally, the mediawiki-graphviz extension has been obsoleted, due to the fact that it is unmaintained upstream and is vulnerable to cross-site scripting attacks.

Note: if you were using the "instances" feature in these packages to support multiple wiki instances, this feature has now been removed. You will need to maintain separate wiki instances manually.

Record: MGASA-2014-0113
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`mediawiki` Debian:12	before 1:1.19.10+dfsg-1	1:1.19.10+dfsg-1
`mediawiki` Debian:13	before 1:1.19.10+dfsg-1	1:1.19.10+dfsg-1
`mediawiki` Debian:14	before 1:1.19.10+dfsg-1	1:1.19.10+dfsg-1
`mediawiki` Mageia:3 From an advisory covering 5 CVEs	before 1.22.2-1.1.mga3	1.22.2-1.1.mga3
`mediawiki-ldapauthentication` Mageia:3 From an advisory covering 5 CVEs	before 2.0f-1.1.mga3	2.0f-1.1.mga3
`mediawiki-math` Mageia:3 From an advisory covering 5 CVEs	before 1.1-1.1.mga3	1.1-1.1.mga3
`mediawiki` Mageia:4 From an advisory covering 5 CVEs	before 1.22.2-1.1.mga4	1.22.2-1.1.mga4
`mediawiki-ldapauthentication` Mageia:4 From an advisory covering 5 CVEs	before 2.0f-1.1.mga4	2.0f-1.1.mga4
`mediawiki-math` Mageia:4 From an advisory covering 5 CVEs	before 1.1-1.1.mga4	1.1-1.1.mga4

History

History
Recorded	Changed	Sources
Nov 6, 2026	affected, facts
Nov 3, 2026	affected
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2013-6451 is a medium vulnerability (CVSS 6.1) in Mediawiki, published March 2, 2014. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.08%, the 65th percentile. Fixed in mediawiki 1:1.19.10+dfsg-1.

References

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