---
id: CVE-2026-55690
title: >-
  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
summary: >-
  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…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-79
  - CWE-80
vendor: StarCitizenWiki
product: mediawiki-extensions-EmbedVideo
affected:
  - mediawiki-extensions-EmbedVideo < 4.1.0
patched:
  - starcitizenwiki/embedvideo 4.1.0
published: '2026-09-15'
updated: '2026-09-15'
sourceUpdated: '2026-09-15T20:17:21.270'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55690'
references:
  - url: >-
      https://github.com/StarCitizenWiki/mediawiki-extensions-EmbedVideo/commit/9215564bf28a0ceb40be550a55ab78efc0accc56
    label: security-advisories@github.com
  - url: >-
      https://github.com/StarCitizenWiki/mediawiki-extensions-EmbedVideo/releases/tag/v4.1.0
    label: security-advisories@github.com
  - url: >-
      https://github.com/StarCitizenWiki/mediawiki-extensions-EmbedVideo/security/advisories/GHSA-c29q-5xm7-5p62
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-c29q-5xm7-5p62'
tags:
  - nvd
  - cve.org
  - ghsa
  - composer
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-15T19:07:18.635076Z'
ecosystem: composer
ingestedAt: '2026-06-22T13:35:24.379Z'
epss: 0.00492
epssPercentile: 0.39599
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-55690)

Affected packages:

- `starcitizenwiki/embedvideo <= 4.0.0`

Patched in:

- `starcitizenwiki/embedvideo 4.1.0`

Source: https://github.com/advisories/GHSA-c29q-5xm7-5p62