CVE-2025-59839: Star Citizen EmbedVideo Extension Stored XSS through wikitext caused by usage of non-reserved data attributes

CVE-2025-59839 · Severity: low · CVSS 3.1 · Published 2025-09-24

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

Technologies: starcitizenwiki/embedvideo (Packagist). Vendors: Packagist.

Quick answers

Is CVE-2025-59839 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-59839 being exploited in the wild.
How severe is CVE-2025-59839?
Low severity, with a CVSS score of 3.1, published 24 September 2025.
Which products and versions are affected?
starcitizenwiki/embedvideo (Packagist) ECOSYSTEM:introduced=0,last_affected=4.0.0.
Is there a fix for CVE-2025-59839?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-59839?
Check whether you run starcitizenwiki/embedvideo (Packagist) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • starcitizenwiki/embedvideo (Packagist) ECOSYSTEM:introduced=0,last_affected=4.0.0

Identifiers

  • CVE-2025-59839
  • GHSA-4j5h-mvj3-m48v

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