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CVE-2026-55690

CVE-2026-55690 · EmbedVideo Extension: Stored XSS via unsanitized service name in exception text

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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, EmbedServiceFactory::newFromName in includes/EmbedService/EmbedServiceFactory.php interpolates an attacker-controlled unknown service name into exception text, and includes/EmbedVideo.php returns that text as HTML through the isHtml output path without neutralization. Both the #ev parser function and the evl parser form can reach this error path. A user able to edit a wiki page can inject stored HTML or JavaScript into the error output, causing code to execute in the wiki origin for visitors who render the page. This issue is fixed in version 4.1.0.

CVSS 7.5 · High · EPSS 0.5% · Fix available

Published
Updated

Stack: php

Affected products and versions

  • mediawiki-extensions-embedvideo

    Versions
    • < 4.1.0: Affected

    No fix published

  • starcitizenwiki/embedvideo Packagist

    Versions
    • 3.0.0
    • 3.0.1
    • 3.0.2
    • 3.0.3
    • 3.0.4
    • 3.0.5
    • 3.0.6
    • 3.0.7
    • 3.0.8
    • 3.0.9
    • 3.1.0
    • 3.2.0
    • 3.2.1
    • 3.2.2
    • 3.2.3
    • 3.2.4
    • 3.2.5
    • 3.2.6
    • 3.2.7
    • 3.2.8
    • 3.3.0
    • 3.4.0
    • 3.4.1
    • 3.4.2
    • 3.4.3
    • 4.0.0
    Affected ranges
    • ECOSYSTEM: < 4.1.0

    Update to 4.1.0

Original sources

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