CVE-2026-30917 HIGH

CVE-2026-30917: Stored XSS on Bucket namespace pages

Vendor Weirdgloop
Product mediawiki-extensions-Bucket
Weakness CWE-79 · XSS
Published March 9, 2026
Last update March 10, 2026
View on NVD All CVEs

CVSS base score

8.8/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:L/SC:L/SI:L/SA:L

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 9, 2026 CVE published
March 10, 2026 Record updated