CVE-2025-3469Network attack vector

Script execution via unescaped multiselect section labels

Published Apr 10, 2025 · Updated Nov 3, 2025

Cross-site scripting in MediaWiki before 1.39.12, 1.42.6, or 1.43.1 allows attackers to execute script through sectioned form labels. HTMLMultiSelectField::formatOptions passed localized section labels to Html::rawElement without applying escapeLabel, causing the labels to be interpreted as markup. Exploitation requires a multiselect configured with sections and attacker-controlled internationalized label content; resulting script executes in the browser that renders the form.

CVSS severity0.0
None
EPSS probability0.43%
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 MediaWiki before 1.39.12, 1.42.6, or 1.43.1 allows attackers to execute script through sectioned form labels. HTMLMultiSelectField::formatOptions passed localized section labels to Html::rawElement without applying escapeLabel, causing the labels to be interpreted as markup. Exploitation requires a multiselect configured with sections and attacker-controlled internationalized label content; resulting script executes in the browser that renders the form.

The record

CVE
CVE-2025-3469
Published
Apr 10, 2025
Updated
Nov 3, 2025
Vendor
Wikimedia Foundation
Product
MediaWiki
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 10, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 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=0 <1.39.12, 1.42.6, 1.43.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wikimedia Foundation · MediaWikiversion=0 <1.39.12, 1.42.6, 1.43.1

Published CVSS scores

0.0Wikimedia FoundationCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/RE:M/U:Green

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

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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