Log in Start free

Vulnerability · Published Sep 15, 2026 · Assigned by GitHub_M

CVE-2026-55692EmbedVideo Extension: Stored XSS via malformed src url with $wgEmbedVideoRequireConsent enabled

High 7.5

In plain English

A high-severity cross-site scripting in mediawiki-extensions-EmbedVideo from StarCitizenWiki. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.5%top 57.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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 the default $wgEmbedVideoRequireConsent configuration enabled, includes/EmbedService/EmbedHtmlFormatter.php places JSON returned through includes/EmbedService/AbstractEmbedService.php into the data-mw-iframeconfig attribute without safely escaping single quotes. Attacker-controlled archiveorg identifiers and wistia or sharepoint URLs accepted by the affected service validators can cause getUrl() output to terminate the attribute and inject event-handler attributes into the generated figure element. A user able to edit a wiki page can store JavaScript that executes in the wiki origin when visitors render the page. This issue is fixed in version 4.1.0.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Packagiststarcitizenwiki/embedvideo4.1.0GHSA-5c7p-g73q-rpg5

Affected products (as reported)

VendorProductVersions
StarCitizenWiki mediawiki-extensions-EmbedVideo < 4.1.0

Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References