Improper autorization over static files

Summary

An improper authorization vulnerability [CWE-285] in FortiOS & FortiProxy may allow an authenticated attacker to access static files of others VDOMs via crafted HTTP or HTTPS requests.

Version Affected Solution
FortiOS 7.6 Not affected Not Applicable
FortiOS 7.4 7.4.0 through 7.4.1 Upgrade to 7.4.2 or above
FortiOS 7.2 7.2.0 through 7.2.8 Upgrade to 7.2.9 or above
FortiOS 7.0 7.0.0 through 7.0.11 Migrate to a fixed release
FortiOS 6.4 Not affected Not Applicable
FortiProxy 7.6 Not affected Not Applicable
FortiProxy 7.4 7.4.0 through 7.4.8 Upgrade to 7.4.9 or above
FortiProxy 7.2 7.2 all versions Migrate to a fixed release
FortiProxy 7.0 7.0 all versions Migrate to a fixed release
FortiProxy 2.0 2.0 all versions Migrate to a fixed release
Follow the recommended upgrade path using our tool at: https://docs.fortinet.com/upgrade-tool

Virtual Patch named "FortiOS.Static.File.Access.Improper.Authentication." is available in FMWP db update 23.104

Acknowledgement

Internally discovered and reported by Kushal Shah from Fortinet's FortiGuard Labs.

Timeline

2025-10-14: Initial publication