Wikimedia MediaWiki up to 1.45.x SpecialBlock.Vue cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, was found in Wikimedia MediaWiki up to 1.45.x. Affected by this issue is some unknown functionality of the file resources/src/MediaWiki.Special.Block/SpecialBlock.Vue. The manipulation results in cross site scripting. This vulnerability is reported as CVE-2026-58035. The attack can be launched remotely. No exploit exists. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic has been found in Wikimedia MediaWiki up to 1.45.x. Affected is some unknown functionality of the file resources/src/MediaWiki.Special.Block/SpecialBlock.Vue. The manipulation with an unknown input leads to a cross site scripting vulnerability. CWE is classifying the issue as 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. This is going to have an impact on 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.Special.Block/SpecialBlock.Vue.

The advisory is shared for download at phabricator.wikimedia.org. This vulnerability is traded as CVE-2026-58035 since 06/27/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. 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 1.46.0 eliminates this vulnerability.

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Productinfo

Type

• Content Management System

Vendor

• Wikimedia

Name

• MediaWiki

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26
• 1.27
• 1.28
• 1.29
• 1.30
• 1.31
• 1.32
• 1.33
• 1.34
• 1.35
• 1.36
• 1.37
• 1.38
• 1.39
• 1.40
• 1.41
• 1.42
• 1.43
• 1.44
• 1.45

License

• open-source

CPE 2.3info

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CPE 2.2info

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