TI-2026-23742 Aliases CVE-2026-30917

Stored XSS on Bucket namespace pages

MEDIUM 44CWE-79Published 2026-03-09 · Updated 2026-03-10

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: None
Impact type: Cross-site scripting
Confidentiality · integrity · availability: High · Low · Low
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00345 28th percentileScored 2026-11-07

Fix Fixed mediawiki-extensions-Bucket (weirdgloop): 2.1.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
weirdgloop	mediawiki-extensions-Bucket	before 2.1.1	2.1.1	Patch available	CNA

mediawiki-extensions-Bucket Vendorweirdgloop Affected before 2.1.1 Fixed in 2.1.1 Patch available CNA

Remediation

Fix · CNA mediawiki-extensions-Bucket (weirdgloop) Fixed in 2.1.1

Timeline

2026-10-02 Threatist record created from CVE-2026-30917

References

Other 3

TI-2025-38160 Bucket vulnerable to infinite recursion when querying a bucket using the != operator CVSS 3.1MEDIUM 6.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences