FortiOS SSLVPN Session Expiration Flaw (pre-7.4.0)
CVE-2025-62631 Published on December 9, 2025
An insufficient session expiration vulnerability [CWE-613] vulnerability in Fortinet FortiOS 7.4.0, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions allows attacker to maintain access to network resources via an active SSLVPN session not terminated after a user's password change under particular conditions outside of the attacker's control
Vulnerability Analysis
CVE-2025-62631 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to be low. considered to have a small impact on confidentiality and integrity and availability.
Weakness Type
Insufficient Session Expiration
According to WASC, "Insufficient Session Expiration is when a web site permits an attacker to reuse old session credentials or session IDs for authorization."
Products Associated with CVE-2025-62631
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Affected Versions
Fortinet FortiOS:- Version 7.4.0 is affected.
- Version 7.2.0, <= 7.2.11 is affected.
- Version 7.0.0, <= 7.0.19 is affected.
- Version 6.4.0, <= 6.4.16 is affected.
Exploit Probability
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.