Vulnerability · Published Sep 25, 2026 · Assigned by wikimedia-foundation

CVE-2026-100381UploadWizard Flickr collection and set titles allow DOM XSS

Medium 5.3

In plain English

A medium-severity cross-site scripting in Mediawiki - UploadWizard Extension from Wikimedia Foundation. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code.

Severity (CVSS 4.0)5.3Medium

Exploit odds (30 days)0.4%top 63.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack tooling1Public PoC

Official 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.

Affected products (as reported)

Vendor	Product	Versions
Wikimedia Foundation	Mediawiki - UploadWizard Extension	* – before 1.46.1, 1.45.5, 1.43.10

Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

In plain English

Official description

Affected products (as reported)

References