CVE-2025-67478 PUBLISHED

Wrong E-Mail address composition for usernames with a comma and Umlauts in it like "Döe, Jähn"

Assigner: wikimedia-foundation
Reserved: 08.12.2025 Published: 03.02.2026 Updated: 03.02.2026

Vulnerability in Wikimedia Foundation CheckUser. This vulnerability is associated with program files includes/Mail/UserMailer.Php.

This issue affects CheckUser: from * before 1.39.14, 1.43.4, 1.44.1.

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U
CVSS Score: 0

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	None	Availability	None
Privileges Required	None
User Interaction	Passive

CVSS 4.0

Vendor	Wikimedia Foundation
Product	CheckUser
Versions	Default: unaffected affected from * to 1.39.14, 1.43.4, 1.44.1 (excl.)