CVE-2026-103584 PUBLISHED

attacker-controlled javascript license URL via XSS

Assigner: wikimedia-foundation
Reserved: 30.09.2026 Published: 30.09.2026 Updated: 01.10.2026

Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki CommonsMetadata extension allows Cross-Site Scripting (XSS).

This issue affects MediaWiki CommonsMetadata extension: 1.46, 1.45, and 1.43.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/R:U/V:C/RE:M/U:Amber
CVSS Score: 1.1

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	Low	Confidentiality	Low
Attack Complexity	High	Integrity	Low	Integrity	Low
Attack Requirements	Present	Availability	Low	Availability	Low
Privileges Required	High
User Interaction	Passive

CVSS 4.0

Product Status

Vendor	The Wikimedia Foundation
Product	MediaWiki CommonsMetadata extension
Versions	Default: unaffected Version 1.46 is affected Version 1.45 is affected Version 1.43 is affected

Credits

Marco Paciaroni (BomboBombone) reporter

References

Problem Types

CWE-80 Improper neutralization of Script-Related HTML tags in a web page (basic XSS) CWE

Impacts

CAPEC-63 Cross-Site Scripting (XSS)