# CVE-2026-103045: MediaWiki Refreshed skin stored cross-site scripting

Source: https://junglewise.ai/threats/cve-2026-103045-improper-neutralization-of-input-during-web-page-generation  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-29. Updated: 2026-09-29  
License: CC BY 4.0 with a link back

CVE-2026-103045 · Severity: info · Published 2026-09-29

The Wikimedia Foundation's MediaWiki Refreshed skin fails to properly sanitize user input when generating web pages, allowing attackers to inject malicious scripts that persist in the database and execute for all users viewing affected content. This stored XSS vulnerability could enable account takeover, session hijacking, or defacement of wiki pages. An attacker with content-creation permissions can exploit this without additional user interaction.

Vendors: [Wikimedia Foundation](https://junglewise.ai/threats/vendors/wikimedia-foundation).

## Quick answers

**Is CVE-2026-103045 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-103045 being exploited in the wild.

**How severe is CVE-2026-103045?** Informational severity, published 29 September 2026.

**Which products and versions are affected?** Wikimedia Foundation MediaWiki Refreshed skin before 1.46.1, 1.45.5, 1.43.10.

**Is there a fix for CVE-2026-103045?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-103045 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-103045?** Check whether you run Wikimedia Foundation MediaWiki Refreshed skin at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The Refreshed skin improperly neutralizes input during web page generation, enabling stored XSS attacks. An authenticated attacker can inject malicious JavaScript that is saved to the database and executed in the browsers of subsequent users viewing the affected page, allowing credential theft or unauthorized actions. Patches are available in versions 1.46.1, 1.45.5, and 1.43.10 and later.

## Affected products

- Wikimedia Foundation MediaWiki Refreshed skin before 1.46.1, 1.45.5, 1.43.10

## Timeline

- 2026-09-29: disclosed

## References

- [https://gerrit.wikimedia.org/r/c/mediawiki/skins/Refreshed/+/1309277](https://gerrit.wikimedia.org/r/c/mediawiki/skins/Refreshed/+/1309277)
- [https://phabricator.wikimedia.org/T268377](https://phabricator.wikimedia.org/T268377)