PSIRTLack of TLS Certificate Validation during initial SSO Authentication
Summary
An improper certificate validation [CWE-295] vulnerability in the FortiManager GUI may allow a remote unauthenticated attacker to view confidential information via a man in the middle [MiTM] attack.
| Version | Affected | Solution |
|---|---|---|
| FortiAnalyzer 8.0 | Not affected | Not Applicable |
| FortiAnalyzer 7.6 | 7.6.0 through 7.6.4 | Upgrade to 7.6.5 or above |
| FortiAnalyzer 7.4 | 7.4.0 through 7.4.8 | Upgrade to 7.4.9 or above |
| FortiAnalyzer 7.2 | 7.2 all versions | Migrate to a fixed release |
| FortiAnalyzer 7.0 | 7.0 all versions | Migrate to a fixed release |
| FortiAnalyzer 6.4 | 6.4 all versions | Migrate to a fixed release |
| FortiManager 8.0 | Not affected | Not Applicable |
| FortiManager 7.6 | 7.6.0 through 7.6.4 | Upgrade to 7.6.5 or above |
| FortiManager 7.4 | 7.4.0 through 7.4.8 | Upgrade to 7.4.9 or above |
| FortiManager 7.2 | 7.2 all versions | Migrate to a fixed release |
| FortiManager 7.0 | 7.0 all versions | Migrate to a fixed release |
| FortiManager 6.4 | 6.4 all versions | Migrate to a fixed release |
This vulnerability is only possible on initial registration with FortiCloud.
Acknowledgement
Fortinet is pleased to thank Konrad Porzezynski for reporting this vulnerability under responsible disclosure.Timeline
2026-03-10: Initial publication