CVE-2025-61641Network attack vector

Service degradation via unrestricted allpages maxsize queries

Published Feb 2, 2026 · Updated Feb 2, 2026

Resource exhaustion in MediaWiki before 1.39.14, 1.43.0 through 1.43.3, and 1.44.0 allows remote attackers to degrade service via its Action API. ApiQueryAllPages accepts the maxsize parameter and constructs an expensive all-pages database query even when MiserMode is enabled. Unauthenticated API access and an installation using MiserMode are sufficient; repeated crafted requests consume database resources and delay other wiki requests.

CVSS severity6.1
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource exhaustion in MediaWiki before 1.39.14, 1.43.0 through 1.43.3, and 1.44.0 allows remote attackers to degrade service via its Action API. ApiQueryAllPages accepts the maxsize parameter and constructs an expensive all-pages database query even when MiserMode is enabled. Unauthenticated API access and an installation using MiserMode are sufficient; repeated crafted requests consume database resources and delay other wiki requests.

The record

CVE
CVE-2025-61641
Published
Feb 2, 2026
Updated
Feb 2, 2026
Vendor
Wikimedia Foundation
Product
MediaWiki
Classifications
CWE-22, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=* <1.39.14, 1.43.4, 1.44.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wikimedia Foundation · MediaWikiversion=* <1.39.14, 1.43.4, 1.44.1

Published CVSS scores

1.7Wikimedia FoundationCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U
6.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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