CVE-2025-59839

Star Citizen EmbedVideo Extension Stored XSS through wikitext caused by usage of non-reserved data attributes

MEDIUM
5.4
CVSS Score
Published: September 25, 2025 at 01:56 PM UTC
Updated: October 11, 2026 at 08:10 PM UTC
2 products affected across 2 vendorsEmbedvideoEmbedvideo

Using mediawiki-extensions-EmbedVideo by StarCitizenWiki?

Get instant alerts when new vulnerabilities affect mediawiki-extensions-EmbedVideo - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Severity
MEDIUM5.4
Exploit prediction
EPSS 0.3%
SSVC
PoC

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. In versions 4.0.0 and prior, the EmbedVideo extension allows adding arbitrary attributes to an HTML element, allowing for stored XSS through wikitext. This issue has been patched via commit 4e075d3.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-79

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Free plan, no card