CVE-2026-100381

Received Received - Intake

Stored XSS in MediaWiki UploadWizard Extension

Publication date: 2026-09-25

Last updated on: 2026-09-25

Assigner: wikimedia-foundation

Description

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation Mediawiki - UploadWizard Extension allows Cross-Site Scripting (XSS). This issue affects Mediawiki - UploadWizard Extension: from * before 1.46.1, 1.45.5, 1.43.10.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-09-25

Last Modified

2026-09-25

Generated

2026-09-26

AI Q&A

2026-09-26

EPSS Evaluated

N/A

NVD

CVE-2026-100381

Affected Vendors & Products

Vendor	Product	Version / Range
wikimedia_foundation	mediawiki_uploadwizard_extension	to 1.46.1 (exc)
wikimedia_foundation	mediawiki_uploadwizard_extension	1.45.5
wikimedia_foundation	mediawiki_uploadwizard_extension	1.43.10

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-79	The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

Executive Summary

This is a Cross-Site Scripting (XSS) vulnerability in the Wikimedia Foundation MediaWiki UploadWizard Extension. It allows attackers to inject malicious scripts into web pages viewed by other users by improperly neutralizing user input during page generation.

Impact Analysis

An attacker could exploit this to steal user sessions, redirect users to malicious sites, or deface web pages. Users viewing affected pages may have their data compromised or be exposed to further attacks.

Compliance Impact

This XSS vulnerability could lead to unauthorized data access or disclosure, violating GDPR's data protection requirements and HIPAA's safeguards for protected health information. Organizations may face compliance violations and legal penalties.

Mitigation Strategies

Update MediaWiki UploadWizard Extension to version 1.46.1, 1.45.5, or 1.43.10 or later to address the XSS vulnerability.

Hi! I’m here to help you understand CVE-2026-100381. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70