CVE-2025-61766

Bucket vulnerable to infinite recursion when querying a bucket using the != operator

6.5 Medium

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

0.39%Up 0.3 points since Oct 7, 2025

What each source reports

CVE List Score used 6.5

Bucket vulnerable to infinite recursion when querying a bucket using the != operator

Record: CVE-2025-61766
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-674
Updated: 2026-11-02

EUVDEUVD-2025-33188 6.5

Record: EUVD-2025-33188
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

NVD 6.5

Record: CVE-2025-61766
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-674
Updated: 2026-11-02

OSV 6.5

Bucket vulnerable to infinite recursion when querying a bucket using the != operator

Record: CVE-2025-61766
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-674
Updated: 2026-11-02

OSVUBUNTU-CVE-2025-61766 6.5

Record: UBUNTU-CVE-2025-61766
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

Affected products

weirdgloop mediawiki-extensions-bucket

Affected packages

Affected packages
Package	Affected	Fixed
`mediawiki` Ubuntu:18.04:LTS	All versions, plus listed versions 1:1.27.3-11:1.27.4-11:1.27.4-21:1.27.4-3	None known
`mediawiki` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 1:1.31.2-1ubuntu11:1.31.5-11:1.31.5-1ubuntu11:1.31.5-21:1.31.5-3 Show 4 moreShow less 1:1.31.5-3ubuntu11:1.31.6-11:1.31.7-11:1.31.7-1ubuntu0.1~esm1	None known
`mediawiki` Ubuntu:Pro:22.04:LTS	All versions, plus listed versions 1:1.35.3-11:1.35.4-11:1.35.5-11:1.35.5-1ubuntu11:1.35.5-1ubuntu21:1.35.5-1ubuntu31:1.35.6-11:1.35.6-1ubuntu0.1~esm1	None known
`mediawiki` Ubuntu:Pro:24.04:LTS	All versions, plus listed versions 1:1.39.4-21:1.39.5-11:1.39.6-11:1.39.7-11:1.39.7-1ubuntu0.1~esm1	None known
`mediawiki` Ubuntu:25.10	All versions, plus listed versions 1:1.43.1+dfsg-11:1.43.1+dfsg-21:1.43.3+dfsg-1	None known
`mediawiki` Ubuntu:26.10	All versions, plus listed versions 1:1.43.8+dfsg-21:1.43.9+dfsg-11:1.43.9+dfsg-1ubuntu1	None known
`mediawiki` Ubuntu:26.04:LTS	All versions, plus listed versions 1:1.43.3+dfsg-11:1.43.5+dfsg-11:1.43.6+dfsg-21:1.43.8+dfsg-11:1.43.8+dfsg-2	None known

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2025-61766 is a medium vulnerability (CVSS 6.5) in Weirdgloop Mediawiki-extensions-bucket, published October 6, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.39%, the 32nd percentile. No source names a fixed version.