CVE-2025-25252: Insufficient Session Expiration in SSLVPN using SAML authentication
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.
Other sources
An Insufficient Session Expiration vulnerability [CWE-613] in FortiOS SSL VPN 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.
— FortiGuard
Affected Software
Remediation
Information
Event History
Frequently Asked Questions
What is the severity of CVE-2025-25252?
CVE-2025-25252 is classified as a high severity vulnerability due to the potential for unauthorized access to sessions.
How do I fix CVE-2025-25252?
To remediate CVE-2025-25252, upgrade FortiOS SSL VPN to version 7.6.3 or later, 7.4.7 or later, 7.2.11 or later, or 7.0.17 or later.
Which versions of FortiOS are affected by CVE-2025-25252?
CVE-2025-25252 affects FortiOS SSL VPN versions 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 all versions of 6.4.
What kind of attack can exploit CVE-2025-25252?
CVE-2025-25252 can be exploited by a remote attacker who may reuse a former admin's session to gain unauthorized access.
Is there a workaround for CVE-2025-25252?
There is no specific workaround for CVE-2025-25252; the recommended action is to update to the secure versions.