CVE-2025-62425

Unknown Unknown - Not Provided

BaseFortify

Publication date: 2025-10-16

Last updated on: 2025-10-21

Assigner: GitHub, Inc.

Description

MAS (Matrix Authentication Service) is a user management and authentication service for Matrix homeservers, written and maintained by Element. A logic flaw in matrix-authentication-service 0.20.0 through 1.4.0 allows an attacker with access to an authenticated MAS session to perform sensitive operations without entering the current password. These include changing the current password, adding or removing an e-mail address and deactivating the account. The vulnerability only affects instances which have the local password database feature enabled (passwords section in the config). Patched in matrix-authentication-service 1.4.1.

CVSS Scores

EPSS Scores

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Meta Information

Published

2025-10-16

Last Modified

2025-10-21

Generated

2026-07-06

AI Q&A

2025-10-16

EPSS Evaluated

2026-07-05

NVD

CVE-2025-62425

EUVD

EUVD-2025-34822

Affected Vendors & Products

Vendor	Product	Version / Range
element	matrix_authentication_service	1.4.0
element	matrix_authentication_service	1.4.1
element	matrix_authentication_service	0.20.0

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-620	When setting a new password for a user, the product does not require knowledge of the original password, or using another form of authentication.

Attack-Flow Graph

Executive Summary

This vulnerability is a logic flaw in the Matrix Authentication Service (MAS) versions 0.20.0 through 1.4.0 that allows an attacker who already has an authenticated MAS session to perform sensitive operations without needing to enter the current password. These operations include changing the current password, adding or removing an email address, and deactivating the account. It only affects instances with the local password database feature enabled and was fixed in version 1.4.1.

Impact Analysis

An attacker with access to an authenticated MAS session could exploit this vulnerability to change your password, modify your email addresses, or deactivate your account without your consent. This could lead to unauthorized account takeover, loss of access, or disruption of your service.

Mitigation Strategies

Upgrade matrix-authentication-service to version 1.4.1 or later, as this version contains the patch for the vulnerability. Additionally, if possible, disable the local password database feature in the configuration to prevent exposure to this issue.

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