CVE-2025-32076Network attack vector

HTTP service interruption via polynomial regex backtracking

Published Apr 11, 2025 · Updated Apr 11, 2025

ReDoS in Wikimedia Foundation MediaWiki Extension:VisualData 1.39 through 1.43 allows remote attackers to interrupt HTTP service. SubmitForm passes user-controlled formula text to preg_replace_callback with overlapping quantified regex groups, causing third-degree polynomial backtracking. No authentication or user interaction is required; crafted formula input triggers excessive regex processing and interrupts HTTP service.

CVSS severity6.9
Medium
EPSS probability0.40%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

ReDoS in Wikimedia Foundation MediaWiki Extension:VisualData 1.39 through 1.43 allows remote attackers to interrupt HTTP service. SubmitForm passes user-controlled formula text to preg_replace_callback with overlapping quantified regex groups, causing third-degree polynomial backtracking. No authentication or user interaction is required; crafted formula input triggers excessive regex processing and interrupts HTTP service.

The record

CVE
CVE-2025-32076
Published
Apr 11, 2025
Updated
Apr 11, 2025
Vendor
Wikimedia Foundation
Product
MediaWiki Extension:VisualData
Classifications
CWE-20, CAPEC-469, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 11, 2025CVE publishedPublication date reported by the CVE source.
  2. Apr 11, 2025Record 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 <=1.43

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wikimedia Foundation · MediaWiki Extension:VisualDataversion=1.39 <=1.43

Published CVSS scores

6.9Wikimedia FoundationCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L

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.

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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-20Improper Input Validation
CAPEC-469HTTP DoS
T1499.004Endpoint Denial of Service: Application or System Exploitation Flood

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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