CVE-2025-32078Network attack vector

Unauthenticated XSS via undisclosed output encoding flaw

Published Apr 11, 2025 · Updated Apr 11, 2025

Cross-site scripting in Wikimedia Foundation VersionCompare 1.39 through 1.43 allows remote attackers to execute script via Special:VersionCompare. Wikimedia has not publicly described which Special:VersionCompare output path fails to encode attacker-controlled data. The published assessment requires neither authentication nor user interaction, but the public record does not document the advertised server-side code-execution path.

CVSS severity6.9
Medium
EPSS probability0.39%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Wikimedia Foundation VersionCompare 1.39 through 1.43 allows remote attackers to execute script via Special:VersionCompare. Wikimedia has not publicly described which Special:VersionCompare output path fails to encode attacker-controlled data. The published assessment requires neither authentication nor user interaction, but the public record does not document the advertised server-side code-execution path.

The record

CVE
CVE-2025-32078
Published
Apr 11, 2025
Updated
Apr 11, 2025
Vendor
Wikimedia Foundation
Product
VersionCompare
Classifications
CWE-116, CAPEC-63, T1059.007
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

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 · VersionCompareversion=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.

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-116Improper Encoding or Escaping of Output
CAPEC-63Cross-Site Scripting (XSS)
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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