What is the CVSS score of CVE-2026-0670?

CVE-2026-0670 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.0%.

Which versions of Mediawiki are affected by CVE-2026-0670?

CVE-2026-0670 presents moderate security risk, a cross-site scripting vulnerability rated CVSS 6.1. Attackers could inject scripts to steal sessions or perform actions as authenticated users.. A patch is available.

Is there a public PoC exploit available for CVE-2026-0670?

Yes, a public proof-of-concept exploit is available for CVE-2026-0670. Prioritise patching immediately. EPSS: 0.0%.

How to fix or mitigate CVE-2026-0670?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Mediawiki CVE-2026-0670

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-01-07 c4f26cc8-17ff-4c99-b5e2-38fc1793eacc

XSS Mediawiki Proofread Page

6.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.1 MEDIUM

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 23, 2026 - 18:40 vuln.today

Public exploit code

Patch released

Feb 23, 2026 - 18:40 nvd

Patch available

CVE Published

Jan 07, 2026 - 19:15 nvd

MEDIUM 6.1

DescriptionCVE.org

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki - ProofreadPage Extension allows Cross-Site Scripting (XSS).This issue affects MediaWiki - ProofreadPage Extension: 1.45, 1.44, 1.43, 1.39.

AnalysisAI

Cross-site scripting (XSS) in MediaWiki's ProofreadPage extension (versions 1.39, 1.43, 1.44, 1.45) allows attackers to inject malicious scripts through improper input sanitization during web page generation. Public exploit code exists for this vulnerability, which requires user interaction to trigger. A patch is available to remediate the issue.

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects Proofread Page. Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki - ProofreadPage Extension allows Cross-Site Scripting (XSS).This issue affects MediaWiki - ProofreadPage Extension: 1.45, 1.44, 1.43, 1.39.

RemediationAI

A vendor patch is available — apply it immediately. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.