CVE-2025-53093 TabberNeue vulnerable to Stored XSS through wikitext
Attackers can inject arbitrary HTML into the DOM via the tabber tag, enabling stored XSS attacks against MediaWiki users.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-53093?
CVE-2025-53093 is a high-severity cross-site scripting vulnerability in StarCitizenTools mediawiki-extensions-TabberNeue, published on 27 Jun 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
TabberNeue is a MediaWiki extension that allows the wiki to create tabs. Starting in version 3.0.0 and prior to version 3.1.1, any user can insert arbitrary HTMLinto the DOM by inserting a payload into any allowed attribute of the `<tabber>` tag. Version 3.1.1 contains a patch for the bug.
Which versions are affected by CVE-2025-53093?
2 open source packages ship an affected version, including starcitizentools/tabber-neue.
| Package | Affected | Fixed in |
|---|---|---|
starcitizentools/tabber-neue Packagist | From 3.0.0 | 3.1.1 |
starcitizentools/tabber-neue Packagist | From 3.0.0 | 3.1.1 |
How do I fix CVE-2025-53093?
Upgrade starcitizentools/tabber-neue to 3.1.1 or later.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2025-53093 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-53093 exists.
Sources
Also known as GHSA-jfj7-249r-7j2m.