Wikimedia MediaWiki up to 1.39.14/1.43.4/1.44.1 mediawiki.Language.Js cross site scripting

CVSS Meta Temp Score
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CTI Interest Score
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4.2$0-$5k0.00

Summaryinfo

A vulnerability was found in Wikimedia MediaWiki up to 1.39.14/1.43.4/1.44.1. It has been declared as problematic. The affected element is an unknown function of the file resources/src/mediawiki.Language/mediawiki.Language.Js. Executing a manipulation can lead to cross site scripting. This vulnerability appears as CVE-2025-11261. The attack may be performed from remote. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Wikimedia MediaWiki up to 1.39.14/1.43.4/1.44.1. It has been declared as problematic. This vulnerability affects some unknown processing of the file resources/src/mediawiki.Language/mediawiki.Language.Js. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. CVE summarizes:

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files resources/src/mediawiki.Language/mediawiki.Language.Js. This issue affects MediaWiki: from * before 1.39.15, 1.43.5, 1.44.2.

The advisory is shared for download at phabricator.wikimedia.org. This vulnerability was named CVE-2025-11261 since 10/03/2025. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are necessary for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1059.007.

Upgrading to version 1.39.15, 1.43.5 or 1.44.2 eliminates this vulnerability.

The vulnerability is also documented in the databases at CNNVD (CNNVD-202602-529) and EUVD (EUVD-2025-206639). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.2
VulDB Meta Temp Score: 4.2

VulDB Base Score: 2.4
VulDB Temp Score: 2.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 6.1
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross site scripting
CWE: CWE-79 / CWE-94 / CWE-74
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: MediaWiki 1.39.15/1.43.5/1.44.2

Timelineinfo

10/03/2025 CVE reserved
02/03/2026 +123 days Advisory disclosed
02/03/2026 +0 days VulDB entry created
03/25/2026 +50 days VulDB entry last update

Sourcesinfo

Advisory: phabricator.wikimedia.org
Status: Confirmed

CVE: CVE-2025-11261 (🔒)
GCVE (CVE): GCVE-0-2025-11261
GCVE (VulDB): GCVE-100-343888
EUVD: 🔒
CNNVD: CNNVD-202602-529 - MediaWiki 安全漏洞

Entryinfo

Created: 02/03/2026 08:06
Updated: 03/25/2026 16:29
Changes: 02/03/2026 08:06 (68), 02/04/2026 05:03 (1), 02/04/2026 11:30 (1), 02/04/2026 19:34 (6), 03/25/2026 16:29 (12)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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