CVE-2025-6590

Severity CVSS v4.0:

MEDIUM

Type:

CWE-200 Information Leak / Disclosure

Publication date:

02/02/2026

Last modified:

02/02/2026

Description

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/htmlform/fields/HTMLUserTextField.Php.<br /> <br /> This issue affects MediaWiki: from * through 1.39.12, 1.42.76 1.43.1, 1.44.0.

Impact

Vector 4.0

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N CVSS v4.0 Severity and Metrics:

Base Score: 4.60 MEDIUM
Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:L/VI:N/VA:N/SC:H/SI:N/SA:N

Attack Vector (AV): Network
Attack Complexity (AC): High
Attack Requirements (AT): Present
Privileges Required (PR): None
User Interaction (UI): Active
Confidentiality (VC): Low
Integrity (VI): None
Availability (VA): None
Confidentiality (SC): High
Integrity (SI): None
Availability (SA): None

Base Score 4.0

4.60

Severity 4.0

MEDIUM

References to Advisories, Solutions, and Tools

https://phabricator.wikimedia.org/T392746