CVE-2025-62701
Unknown Unknown - Not Provided

BaseFortify

Publication date: 2025-10-21

Last updated on: 2025-10-21

Assigner: wikimedia-foundation

Description
Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in The Wikimedia Foundation Mediawiki - Wikistories allows Stored XSS.This issue affects Mediawiki - Wikistories: from master before 1.44.

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Meta Information

Published
2025-10-21
Last Modified
2025-10-21
Generated
2026-07-06
AI Q&A
2025-10-21
EPSS Evaluated
2026-07-05
NVD
CVE-2025-62701
EUVD
EUVD-2025-35136

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
the_wikimedia_foundation mediawiki 1.43
the_wikimedia_foundation mediawiki 1.44
the_wikimedia_foundation mediawiki 1.45.0-alpha
the_wikimedia_foundation mediawiki master

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
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.

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Executive Summary

CVE-2025-62701 is a stored Cross-Site Scripting (XSS) vulnerability in the Wikistories extension of MediaWiki. It occurs because certain system messages are inserted as raw HTML into web pages without proper sanitization. This allows an attacker who can edit these messages to inject malicious HTML or JavaScript code that will be stored and executed in users' browsers when they view affected pages. [1]

Impact Analysis

This vulnerability can allow attackers to execute arbitrary JavaScript in the browsers of users who visit affected pages. This can lead to theft of user credentials, session hijacking, defacement, or other malicious actions performed on behalf of the user without their consent. [1]

Detection Guidance

This vulnerability can be detected by testing if editable system messages in the Wikistories extension are vulnerable to stored XSS. Specifically, you can attempt to inject a harmless payload such as <img src='' onerror='alert("test")'> into messages like MediaWiki:Wikistories-story-selecttext via the MediaWiki interface. Then, navigate to /wiki/Special:StoryBuilder/Main_Page and observe if the alert triggers, indicating execution of injected script. There are no specific network commands provided, but manual testing through the MediaWiki interface and observing the rendered HTML in the browser's developer tools can help detect the issue. [1]

Mitigation Strategies

Immediate mitigation steps include applying the official patch (T400545.patch) that sanitizes and parses system messages before inserting them as HTML, preventing raw injection. Until the patch is applied, restrict editing permissions on the vulnerable system messages (e.g., wikistories-story-selecttext, wikistories-story-edittext-duplicate, wikistories-story-edittext-outdated) to trusted users only to prevent malicious payload injection. Additionally, monitor and review any recent edits to these messages for suspicious content. [1]

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