GHSA-4j5h-mvj3-m48v

Suggest an improvement
Source
https://github.com/advisories/GHSA-4j5h-mvj3-m48v
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/09/GHSA-4j5h-mvj3-m48v/GHSA-4j5h-mvj3-m48v.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-4j5h-mvj3-m48v
Aliases
Related
Published
2025-09-24T20:11:17Z
Modified
2025-09-26T16:52:00Z
Severity
  • 8.6 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L CVSS Calculator
Summary
Star Citizen EmbedVideo Extension Stored XSS through wikitext caused by usage of non-reserved data attributes
Details

Summary

The EmbedVideo extension allows adding arbitrary attributes to an HTML element, allowing for stored XSS through wikitext.

Details

The attributes of an iframe are populated with the value of an unreserved data attribute (data-iframeconfig) that can be set via wikitext: https://github.com/StarCitizenWiki/mediawiki-extensions-EmbedVideo/blob/440fb331a84b2050f4cc084c1d31d58a1d1c202d/resources/ext.embedVideo.videolink.js#L5-L20 Similar code is also present here: https://github.com/StarCitizenWiki/mediawiki-extensions-EmbedVideo/blob/440fb331a84b2050f4cc084c1d31d58a1d1c202d/resources/modules/iframe.js#L139-L155

It is possible to execute JS through attributes like onload or onmouseenter.

PoC

  1. Create a page with the following contents:
<div class="embedvideo-evl" data-iframeconfig='{"onload": "alert(1)"}'>Click me!</div>
<evlplayer></evlplayer>
  1. Click on the "Click me!" text
  2. Click on the "Load video" button below image

Impact

Arbitrary HTML can be inserted into the DOM by any user, allowing for JavaScript to be executed.

Database specific 
{
    "cwe_ids": [
        "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-09-24T20:11:17Z",
    "nvd_published_at": "2025-09-25T14:15:46Z",
    "severity": "HIGH"
}
References

Affected packages

Packagist / starcitizenwiki/embedvideo

Package

Name
starcitizenwiki/embedvideo
Purl
pkg:composer/starcitizenwiki/embedvideo

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Last Affected
4.0.0

Affected versions

3.*
3.0.0
3.0.1
3.0.2
3.0.3
3.0.4
3.0.5
3.0.6
3.0.7
3.0.8
3.0.9
3.1.0
3.2.0
3.2.1
3.2.2
3.2.3
3.2.4
3.2.5
3.2.6
3.2.7
3.2.8
3.3.0
3.4.0
3.4.1
3.4.2
3.4.3
4.*
4.0.0

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/09/GHSA-4j5h-mvj3-m48v/GHSA-4j5h-mvj3-m48v.json"