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Vulnerability Details :

CVE-2025-6589

Assigner Org ID-c4f26cc8-17ff-4c99-b5e2-38fc1793eacc

Published At-02 Feb, 2026 | 23:03

Updated At-03 Feb, 2026 | 21:11

With MultiBlocks enabled and a user who is suppressed via a MultiBlock, a user without 'hideuser' can see the hidden username in the BlockList

Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/specials/pagers/BlockListPager.Php. This issue affects MediaWiki: >= 1.42.0.

EPSS History

Score

Latest Score

N/A

Percentile

Latest Percentile

N/A

▼Common Vulnerabilities and Exposures (CVE)

cve.org

Assigner:wikimedia-foundation

Assigner Org ID:c4f26cc8-17ff-4c99-b5e2-38fc1793eacc

Published At:02 Feb, 2026 | 23:03

Updated At:03 Feb, 2026 | 21:11

▼CVE Numbering Authority (CNA)

With MultiBlocks enabled and a user who is suppressed via a MultiBlock, a user without 'hideuser' can see the hidden username in the BlockList

Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/specials/pagers/BlockListPager.Php. This issue affects MediaWiki: >= 1.42.0.

Affected Products

Vendor

Wikimedia Foundation

Product

MediaWiki

Repo

https://gerrit.wikimedia.org/g/mediawiki/core/+/refs/heads/master

Program Files

includes/specials/pagers/BlockListPager.php

Default Status

unaffected

Versions

Affected

>= 1.42.0

Metrics

Version	Base score	Base severity	Vector
4.0	2.1	LOW	CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/AU:Y

Version: 4.0

Base score: 2.1

Base severity: LOW

Vector:

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

References

Hyperlink	Resource
https://phabricator.wikimedia.org/T391343	N/A

Hyperlink: https://phabricator.wikimedia.org/T391343

Resource: N/A

▼Authorized Data Publishers (ADP)

CISA ADP Vulnrichment

Metrics Other Info

▼National Vulnerability Database (NVD)

nvd.nist.gov

Source:c4f26cc8-17ff-4c99-b5e2-38fc1793eacc

Published At:02 Feb, 2026 | 23:16

Updated At:03 Feb, 2026 | 16:44

Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/specials/pagers/BlockListPager.Php. This issue affects MediaWiki: >= 1.42.0.

Date Added	Due Date	Vulnerability Name	Required Action
	N/A

Metrics

Type	Version	Base score	Base severity	Vector
Secondary	4.0	2.1	LOW	CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:X/U:X

Type: Secondary

Version: 4.0

Base score: 2.1

Base severity: LOW

Vector:

CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:X/RE:X/U:X

References

Hyperlink	Source	Resource
https://phabricator.wikimedia.org/T391343	c4f26cc8-17ff-4c99-b5e2-38fc1793eacc	N/A

Hyperlink: https://phabricator.wikimedia.org/T391343

Source: c4f26cc8-17ff-4c99-b5e2-38fc1793eacc

Resource: N/A

CVE-2025-6589

Credits

With MultiBlocks enabled and a user who is suppressed via a MultiBlock, a user without 'hideuser' can see the hidden username in the BlockList

Vendors

Products

Metrics (CVSS)

Weaknesses

Attack Patterns

Solution/Workaround

References

EPSS History

Score

Latest Score

N/A

Percentile

Latest Percentile

N/A

Stakeholder-Specific Vulnerability Categorization (SSVC)

Affected Products

Affected

Metrics

Metrics Other Info

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Credits

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Replaced By

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References

Affected Products

Metrics

Metrics Other Info

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Timeline

Replaced By

Rejected Reason

References

CISA Catalog

Metrics

CPE Matches

Evaluator Description

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Change History

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