CVE-2026-30917: Weirdgloop Mediawiki-Extensions-Bucket

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

Bucket is a MediaWiki extension to store and retrieve structured data on articles. Prior to 2.1.1, a stored XSS can be inserted into any Bucket table field that has a PAGE type, which will execute whenever a user views that table's corresponding Bucket namespace page. This vulnerability is fixed in 2.1.1.

Affected products

• Weirdgloop Mediawiki-Extensions-Bucket: before 2.1.1 (fixed in 2.1.1)

Published 2026-03-10. Last modified 2026-06-17.