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Vulnerabilities

Vulnerability · CVE-2025-62425

MAS (Matrix Authentication Service) is a user management and authentication service for Matrix homeservers, written and maintained by Element.

Published Oct 16, 2025 · catalog updated Oct 16, 2025 · MAS (Matrix Authentication Service)

Last checked Oct 26, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-62425. EPSS is 0.45%. Act only if a listed version of MAS (Matrix Authentication Service) is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (MAS (Matrix Authentication Service)).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.45%
Remediation
Advisory link
Affected products
vendor element-hq matrix-authentication-service 0.20.0, ≤ 1.4.0

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 ma

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor element-hq matrix-authentication-service 0.20.0, ≤ 1.4.00.20.0, ≤ 1.4.0

How to fix CVE-2025-62425

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-62425. EPSS is 0.45%. Act only if a listed version of MAS (Matrix Authentication Service) is installed.

Which versions are affected?

Compare what you have installed with element-hq matrix-authentication-service 0.20.0, ≤ 1.4.0 0.20.0, ≤ 1.4.0. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.45%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 16, 2025 · EUVD

    Detected

    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 r

  2. Oct 16, 2025 · EUVD

    Updated

    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 r

Sources

  • CVE.orgVulnerability recordCVE-2025-62425

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-62425

    30-day exploitation probability 0.45%

    first.org
  • EUVDVulnerability recordEUVD-2025-34822

    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 perf

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • FIRST EPSSOct 26, 2026
  • CVE.orgOct 26, 2026
  • EUVDOct 26, 2026