CVE-2026-57440
High
Description
The EmbedVideo Extension is a MediaWiki extension which adds a parser function called #ev and various parser tags for embedding video clips from various video sharing services. Prior to 4.1.0, with $wgEmbedVideoRequireConsent disabled (not the default), the urls for videos are passed into an iframe src attribute without sanitization. When given a malformed url or id, the src attribute can be escaped via double quotes, allowing for html/javascript injection. Version 4.1.0 contains a patch.
SeverityHigh
CVSS7.5
Exploit probability—
ProductStarcitizenwiki/embedvideo
PublishedSep 24, 2026
First seenSep 24, 2026
Weakness typeCWE-79Cross-site scripting (XSS)CWE-80CWE-80
How to fix
Update
- starcitizenwiki/embedvideo4.1.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| starcitizenwiki/embedvideoPackagist | v < 4.1.0 | 4.1.0 |
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