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CVE-2025-62666— DoS vector through the cirrusbuilddoc query API

Quick assessment

Affected
The Wikimedia Foundation Mediawiki - CirrusSearch Extension
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Mediawiki - CirrusSearch Extension是Mediawiki开源的一个搜索功能增强插件。 Mediawiki - CirrusSearch Extension master版本至1.43之前版本存在安全漏洞，该漏洞源于资源分配无限制或节流，可能导致HTTP拒绝服务。

AI Predicted 7.5 Difficulty: Easy EPSS 0.44% · P36

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2025-62666

Vulnerability Information
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Vulnerability Title
DoS vector through the cirrusbuilddoc query API
Source: CVE Program / CVE List V5
Vulnerability Description
Allocation of Resources Without Limits or Throttling vulnerability in The Wikimedia Foundation Mediawiki - CirrusSearch Extension allows HTTP DoS.This issue affects Mediawiki - CirrusSearch Extension: from master before 1.43.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5
Vulnerability Title
Mediawiki - CirrusSearch Extension 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mediawiki - CirrusSearch Extension是Mediawiki开源的一个搜索功能增强插件。 Mediawiki - CirrusSearch Extension master版本至1.43之前版本存在安全漏洞，该漏洞源于资源分配无限制或节流，可能导致HTTP拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
The Wikimedia Foundation Mediawiki - CirrusSearch Extension master ~ 1.43 -

II. Public POCs for CVE-2025-62666

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III. Intelligence Information for CVE-2025-62666

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Same Patch Batch · The Wikimedia Foundation · 2025-10-18 · 10 CVEs total

CVE-2025-11937 Stored XSS through a system message in SecurePoll
CVE-2025-62667 Stored XSS through article extracts in GrowthExperiments
CVE-2025-62668 Insufficient permission checks in action=growthsetmentor
CVE-2025-62669 UserInfoCard: activeLocalBlocksAllWikis does not do permissions checks
CVE-2025-62670 Stored XSS through a system message in FlexDiagrams
CVE-2025-62671 Stored XSS through wikitext in Cargo
CVE-2025-62662 Stored XSS through system messages in AdvancedSearch
CVE-2025-62663 Stored XSS through a system message in UploadWizard
CVE-2025-62664 Stored XSS through a system message in ImageRating

IV. Related Vulnerabilities

Same product: Mediawiki - CirrusSearch Extension
Same vendor: The Wikimedia Foundation
Same weakness: CWE-770

V. Comments for CVE-2025-62666

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