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CVE-2025-59839

Star-citizen Embedvideo cross-site scripting (XSS)

8.6 HIGHPublic exploitEPSS 0.30%
  1. Published25 Sept 2025

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityLow
AvailabilityLow
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

Affected products

Star-citizen Embedvideo≤ 4.0.0

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2025-59839 being actively exploited?

CVE-2025-59839 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.30%.

How severe is CVE-2025-59839?

CVE-2025-59839 has a CVSS 3.1 base score of 8.6, rated high. EPSS estimates a 0.30% probability of exploitation.

Which products are affected by CVE-2025-59839?

Affected products include Star-citizen Embedvideo.

How do I fix CVE-2025-59839?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.