CVE-2026-39936 Details
Description
Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - Score Extension allows Cross-Site Scripting (XSS). The issue has been remediated on the `master` branch, and in the release branches for MediaWiki versions 1.43, 1.44, and 1.45.
A stored cross-site scripting vulnerability has been identified in the Score extension of Wikimedia's MediaWiki. This issue arises from the extension's use of non-reserved data attributes to store URLs, which are then linked in a way that allows for the injection of malicious scripts. The vulnerability is triggered through user interaction with the injected content.
The vulnerability has been addressed by updating the Score extension to use reserved data attributes for storing URLs. Users should ensure they are using the latest version of the Score extension where this fix has been applied.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No CVSS 3.x data is available for this CVE.
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Apr 8, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://phabricator.wikimedia.org/T419186 | CISA-ADP | |
| https://gerrit.wikimedia.org/r/q/I1fb2913bc32328cbc4ecd4b4ad4a4788fb98c56c | wikimedia-foundation | |
| https://phabricator.wikimedia.org/T419186 | wikimedia-foundation |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | wikimedia-foundation |
Affected Products
No affected product data is available for this CVE.
Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 21, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | wikimedia-foundation |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 8, 2026 | CVE Modified | wikimedia-foundation |
| Apr 8, 2026 | CVE Modified | CISA-ADP |
| Apr 7, 2026 | New CVE Received | wikimedia-foundation |