CVE-2025-25252

MediumCVSS 4.8

Published: 14/10/2025(UTC)Updated: 13/09/2026(UTC)Translated: 13/09/2026(UTC)NVD NIST

Exploitation Probability (EPSS)

Low risk

0.31%

24th percentile - higher than 24% of all known CVEs

Summary

An Insufficient Session Expiration vulnerability (CWE-613) in FortiOS SSL VPN 7.6.0 through 7.6.2, 7.4.0 through 7.4.6, 7.2.0 through 7.2.10, 7.0.0 through 7.0.16, and 6.4 all versions may allow a remote attacker (e.g., a former admin whose account was removed and session terminated) in possession of the SAML record of a user session to access or re-open that session via re-use of the SAML record.

Risk Assessment

The vulnerability allows unauthorized access to an SSL VPN session by reusing a captured SAML record, potentially leading to confidentiality and integrity breaches. The risk is especially relevant for former employees or administrators.

Recommendation

Update FortiOS to a version containing the fix, as recommended by Fortinet. Additionally, consider invalidating all active SAML sessions and strengthening monitoring of SSL VPN access.

Other vulnerabilities in FortiOS SSL VPN

CVE-2022-42475CriticalActively exploited
A heap-based buffer overflow vulnerability [CWE-122] in FortiOS SSL-VPN 7.2.0 through 7.2.2, 7.0.0 through 7.0.8, 6.4.0 through 6.4.10, 6.2.0 through 6.2.11, 6.0.15 and earlier and FortiProxy SSL-VPN 7.2.0 through 7.2.1, 7.0.7 and earlier may allow a remote unauthenticated attacker to execute arbitrary code or commands via specifically crafted requests.

Original NVD description (English source)

An Insufficient Session Expiration vulnerability [CWE-613] in FortiOS SSL VPN 7.6.0 through 7.6.2, 7.4.0 through 7.4.6, 7.2.0 through 7.2.10, 7.0.0 through 7.0.16, 6.4 all versions may allow a remote attacker (e.g. a former admin whose account was removed and whose session was terminated) in possession of the SAML record of a user session to access or re-open that session via re-use of SAML record.