GHSA-v65j-hff3-753c

Suggest an improvement
Source
https://github.com/advisories/GHSA-v65j-hff3-753c
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-v65j-hff3-753c/GHSA-v65j-hff3-753c.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-v65j-hff3-753c
Aliases
Published
2026-09-25T15:03:43Z
Modified
2026-09-25T15:15:06Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
Summary
Mediawiki EmbedVideo Extension has stored XSS via malformed src url with $wgEmbedVideoRequireConsent disabled
Details

Summary

With $wgEmbedVideoRequireConsent disabled (not the default), the urls for videos are passed into an iframe src attribute without sanitization. When given a malformed url or id, the src attribute can be escaped via double quotes, allowing for html/javascript injection.

Details

The iframe assembled here adds the url from getUrl() as the src without sanitization. The id regex for the archiveorg service and the url regexes for the wistia and sharepoint services allow for double quotes to be introduced.

PoC

Using double quotes, the src attribute can be escaped.

<embedvideo service="archiveorg" id='a" onmouseover="alert(document.domain)" data-x="'></embedvideo>

Impact

When $wgEmbedVideoRequireConsent = false, any user able to edit a page can inject arbitrary JavaScript into an HTML event handler attribute (e.g. onfocus) via parameter. It requires no interaction (autofires via autofocus) and executes in the wiki origin for every visitor to the page.

Database specific 
{
    "cwe_ids":  [
        "CWE-79",
        "CWE-80"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-09-25T15:03:43Z",
    "nvd_published_at":  "2026-09-24T19:17:14Z",
    "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
Fixed
4.1.0

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

last_known_affected_version_range 
"<= 4.0.0"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-v65j-hff3-753c/GHSA-v65j-hff3-753c.json"