CVE-2025-62425

8.3 HIGH 0.5% exploit odds Fix listed Other Server

What it is

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.

At a glance

Exploitability: Can be exploited over the network with a low-privilege account. High risk of data tampering, service disruption.
Exploit odds: 0.5% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2025-10-16 19:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-10-09 10:10 UTC Last updatedMost recent change to the record

Why it ranks here

Exploited in the wild: no, CISA does not list it.
Exploit odds: 0.5% in the next 30 days (EPSS).
Severity: 8.3 HIGH (CVSS).
Fix: a patch or advisory is linked.

Details

Published: 2025-10-16 19:15 UTC
Last modified: 2026-10-09 10:10 UTC
Exploit probability: 0.5% · EPSS, next 30 days
Weakness: CWE-620
Record status: Deferred

Attack profile CVSS 3.1 · 8.3

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None
Scope: Unchanged
Confidentiality: Low
Integrity: High
Availability: High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H

Is it in your code?

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Fix and advisories

References

NVD record · CVE.org record