CVE-2026-39935
Cross-Site Scripting in Mediawiki CampaignEvents Extension
Publication date: 2026-04-07
Last updated on: 2026-04-08
Assigner: wikimedia-foundation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| the_wikimedia_foundation | mediawiki_campaignevents_extension | to 1.43.7 (inc) |
| the_wikimedia_foundation | mediawiki_campaignevents_extension | to 1.44.4 (inc) |
| the_wikimedia_foundation | mediawiki_campaignevents_extension | to 1.45.2 (inc) |
Helpful Resources
Exploitability
| 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. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a Cross-Site Scripting (XSS) issue caused by improper neutralization of input during web page generation in the Wikimedia Foundation Mediawiki CampaignEvents Extension. It affects versions 1.43.7, 1.44.4, and 1.45.2 of the extension.
How can this vulnerability impact me? :
The vulnerability allows attackers to inject malicious scripts into web pages generated by the CampaignEvents Extension. This can lead to unauthorized actions such as stealing user credentials, session hijacking, or executing malicious code in the context of the affected website.