XSS in Starcitizentools Mediawiki-Extensions-Tabberneue

CVE-2025-53093

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.004 (28.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2025-53093?
CVE-2025-53093 is a high-severity vulnerability in Starcitizentools Mediawiki-Extensions-Tabberneue, classified under Cross-site Scripting. CVSS score: 8.6/10. Published 2025-06-27.
How severe is CVE-2025-53093?
High severity. CVSS v3 base score is 8.6 out of 10.