Vulnerability · Published Mar 9, 2026 · Assigned by GitHub_M
CVE-2026-30917Stored XSS on Bucket namespace pages
High 8.8
In plain English
A high-severity cross-site scripting in mediawiki-extensions-Bucket from weirdgloop. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).
Severity (CVSS 4.0)8.8High
Exploit odds (30 days)0.3%top 71.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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 (as reported)
| Vendor | Product | Versions |
|---|---|---|
| weirdgloop | mediawiki-extensions-Bucket | < 2.1.1 |
Weakness: CWE-79 · 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
References
- https://github.com/weirdgloop/mediawiki-extensions-Bucket/security/advisories/GHSA-8jrp-37wc-5v7c x_refsource_CONFIRM
- https://github.com/weirdgloop/mediawiki-extensions-Bucket/commit/46ec08876ba9064987f20e8f42690854202a73ff x_refsource_MISC
- https://github.com/weirdgloop/mediawiki-extensions-Bucket/commit/cba9cf9c8751e9f3e6d559f44cadc39b84f7bff6 x_refsource_MISC