CVE-2026-0670Public exploitNetwork attack vector

Stored XSS via raw pagelist message insertion

Published Jan 7, 2026 · Updated Jan 7, 2026

Stored XSS in Wikimedia Foundation Proofread Page Extension 1.39, 1.43, 1.44, and 1.45 allows remote attackers to run scripts in editors' browsers. PagelistInputWidget.TopPanel.js inserts a system message containing a user-controlled pagelist parameter as raw HTML instead of text. A victim must preview a crafted pagelist and activate its preview control; a saved payload then executes for other editors who preview that index.

CVSS severity6.1
Medium
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in Wikimedia Foundation Proofread Page Extension 1.39, 1.43, 1.44, and 1.45 allows remote attackers to run scripts in editors' browsers. PagelistInputWidget.TopPanel.js inserts a system message containing a user-controlled pagelist parameter as raw HTML instead of text. A victim must preview a crafted pagelist and activate its preview control; a saved payload then executes for other editors who preview that index.

The record

CVE
CVE-2026-0670
Published
Jan 7, 2026
Updated
Jan 7, 2026
Vendor
Wikimedia Foundation
Product
Proofread Page Extension
Classifications
CWE-79, CAPEC-63, T1059.007
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 7, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 7, 2026Record 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
  2. Affected versionversion=1.43
  3. Affected versionversion=1.44
  4. Affected versionversion=1.45

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Wikimedia Foundation · Proofread Page Extensionversion=1.39; version=1.43; version=1.44; version=1.45

Published CVSS scores

6.1CISA-ADPCVSS: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 exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CAPEC-63Cross-Site Scripting (XSS)
T1059.007JavaScript/JScript

Public exploit references

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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