Star Citizen EmbedVideo Extension Stored XSS through wikitext caused by usage of non-reserved data attributes
Priority HIGH 70CWE-79Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- High · Low · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-79.
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. 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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0031 23rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| StarCitizenWiki | mediawiki-extensions-EmbedVideo | up to 4.0.0 | — | No fix listed | CNA |
| — | starcitizenwiki/embedvideo (Packagist) | up to 4.0.0 | — | No fix listed | GHSA-4j5h-mvj3-m48v |
- mediawiki-extensions-EmbedVideo VendorStarCitizenWiki Affected up to 4.0.0 Fixed in — No fix listed CNA
- starcitizenwiki/embedvideo (Packagist) Vendor— Affected up to 4.0.0 Fixed in — No fix listed GHSA-4j5h-mvj3-m48v
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:star-citizen:embedvideo:*:*:*:*:*:mediawiki:*:* | up to 4.0.0 | Vulnerable | Star-citizen |
- cpe:2.3:a:star-citizen:embedvideo:*:*:*:*:*:mediawiki:*:* Versions up to 4.0.0 Vulnerable ·Star-citizen
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2025-59839
- 2026-10-03 Alias added: GHSA-4j5h-mvj3-m48v
References
Other 3
- https://github.com/StarCitizenWiki/mediawiki-extensions-EmbedVideo/blob/440fb331a84b2050f4cc084c1d31d58a1d1c202d/resources/ext.embedVideo.videolink.js#L5-L20
- https://github.com/StarCitizenWiki/mediawiki-extensions-EmbedVideo/blob/440fb331a84b2050f4cc084c1d31d58a1d1c202d/resources/modules/iframe.js#L139-L155
- https://github.com/StarCitizenWiki/mediawiki-extensions-EmbedVideo
More StarCitizenWiki vulnerabilities
- TI-2026-40206 EmbedVideo Extension : Stored XSS via unsanitized class passed to template CVSS 3.1HIGH 8.6
- TI-2026-41377 Mediawiki EmbedVideo Extension has stored XSS via malformed src url with $wgEmbedVideoRequireConsent disabled CVSS 3.1HIGH 7.5
- TI-2026-40207 EmbedVideo Extension: Stored XSS via malformed src url with $wgEmbedVideoRequireConsent enabled CVSS 3.1HIGH 7.5
- TI-2026-40205 EmbedVideo Extension: Stored XSS via unsanitized service name in exception text CVSS 3.1HIGH 7.5
Sources
- CVE-2025-59839 · CVE Program
- CVE-2025-59839 · NVD
- FIRST EPSS
- GHSA-4j5h-mvj3-m48v · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences