Vulnerability · Published Oct 16, 2025 · Assigned by GitHub_M
CVE-2025-62425Matrix Authentication Service account password can be changed using an authenticated session without supplying the current password
High 8.3
In plain English
A high-severity security flaw in matrix-authentication-service from element-hq. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| element-hq | matrix-authentication-service | >= 0.20.0, <= 1.4.0 |
Weakness: CWE-620 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H