Vulnerability · Published Oct 6, 2025 · Assigned by GitHub_M
CVE-2025-61766Bucket vulnerable to infinite recursion when querying a bucket using the != operator
Medium 6.5
In plain English
A medium-severity security flaw 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 0.4% (higher than 33% of all known vulnerabilities).
Official description
Bucket is a MediaWiki extension to store and retrieve structured data on articles. Prior to version 1.0.0, infinite recursion can occur if a user queries a bucket using the `!=` comparator. This will result in PHP's call stack limit exceeding, and/or increased memory consumption, potentially leading to a denial of service. Version 1.0.0 contains a patch for the issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:25.10 | mediawiki | no fix listed | UBUNTU-CVE-2025-61766 |
| Ubuntu:26.04:LTS | mediawiki | no fix listed | UBUNTU-CVE-2025-61766 |
| Ubuntu:26.10 | mediawiki | no fix listed | UBUNTU-CVE-2025-61766 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| weirdgloop | mediawiki-extensions-Bucket | < 1.0.0 |
Weakness: CWE-674 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
References
- https://github.com/weirdgloop/mediawiki-extensions-Bucket/security/advisories/GHSA-r9f2-4jh3-659j x_refsource_CONFIRM
- https://github.com/weirdgloop/mediawiki-extensions-Bucket/commit/6f4a71d531cb802cdb991d2a4ca7bf8fb691defd x_refsource_MISC
- https://github.com/weirdgloop/mediawiki-extensions-Bucket/blob/ad704120a1660b5929fb5825db1cf85c9c77acf4/includes/Expression/MemberOfExpression.php#L34 x_refsource_MISC