StarCitizenWiki Extension Embed Video: Stored XSS via malformed src url with $wgEmbedVideoRequireConsent enabled

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

7.5 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS

• CVE-2026-55692: 0.49% estimated exploitation activity in the next 30 days; percentile 42.31 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Summary With $wgEmbedVideoRequireConsent enabled (the default), the urls for videos are stored in a json-ified data attributedata-mw-iframeconfig. When given a malformed url or id, the data-mw-iframeconfig attribute can be escaped via single quotes, allowing for html/javascript injection. Details The sprintf here adds the iframe config encoded as JSON here. When given a malicious url or id with a single quote, the $this-getUrl() call returns an unescaped payload that terminates the data-mw-iframeconfig attribute and allows for injecting attributes, including handlers, into the figure element. The id regex for the archiveorg service and the url regexes for the wistia and sharepoint services allow for single quotes to be introduced. PoC A couple of examples across services Impact Under the default $wgEmbedVideoRequireConsent = true configuration, any user able to edit a page can inject arbitrary JavaScript into an HTML event handler attribute (e.g. onfocus) via parameter. It requires…

Published by the source

19 Jun 2026, 21:41 UTC

Last modified by the source

13 Oct 2026, 20:50 UTC

Source last checked

26 Oct 2026, 14:53 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-5c7p-g73q-rpg5

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# Patch Next advisory brief: CVE-2026-55692

Advisory: StarCitizenWiki Extension Embed Video: Stored XSS via malformed src url with $wgEmbedVideoRequireConsent enabled
IDs: CVE-2026-55692, GHSA-5c7p-g73q-rpg5
Record: https://patchnext.com/advisories/cve-2026-55692 (revision 1, source checked 26 Oct 2026, 14:53 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 7.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: starcitizenwiki/embedvideo 4.1.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist starcitizenwiki/embedvideo: affected <= 4.0.0; fixed in 4.1.0

## Suggested inspection (read-only)
- Packagist starcitizenwiki/embedvideo: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on starcitizenwiki/embedvideo.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-5c7p-g73q-rpg5 (GitHub-reviewed advisory GHSA-5c7p-g73q-rpg5 lists affected ranges: Packagist starcitizenwiki/embedvideo >=0 <=4.0.0)

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