Improper Acc. Control in FortiAuth 6.6.0-6.6.4 & 6.5-6.3 Leaks Admin Creds
CVE-2025-59923 Published on December 9, 2025

An improper access control vulnerability in Fortinet FortiAuthenticator 6.6.0 through 6.6.6, FortiAuthenticator 6.5 all versions, FortiAuthenticator 6.4 all versions, FortiAuthenticator 6.3 all versions may allow an authenticated attacker with at least read-only admin permission to obtain the credentials of other administrators' messaging services via crafted requests.

NVD

Vulnerability Analysis

CVE-2025-59923 can be exploited with network access, and requires user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity and availability.

Attack Vector:
NETWORK
Attack Complexity:
LOW
Privileges Required:
HIGH
User Interaction:
NONE
Scope:
UNCHANGED
Confidentiality Impact:
LOW
Integrity Impact:
NONE
Availability Impact:
NONE

Weakness Type

What is an Authorization Vulnerability?

The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

CVE-2025-59923 has been classified to as an Authorization vulnerability or weakness.


Products Associated with CVE-2025-59923

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Fortinet Fortiauthenticator
 

Affected Versions

Fortinet FortiAuthenticator:

Exploit Probability

EPSS
0.04%
Percentile
10.83%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.