XSS in Wikimedia Foundation MediaWiki - Uploadwizard Extension

CVE-2026-100381

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.

Vulnerability class: XSS (Cross-Site Scripting)

Published · last modified .

EPSS exploit prediction

EPSS: 0.004 (36.3th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-100381: held from 0.003 to 0.004.

EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2026-100381?
CVE-2026-100381 is a vulnerability in Wikimedia Foundation MediaWiki - Uploadwizard Extension, classified under Cross-site Scripting. Published 2026-09-25.
Is CVE-2026-100381 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.