Arbitrary log file read in administrative interface

Summary

An Improper Neutralization of Argument Delimiters in a Command ('Argument Injection') vulnerability [CWE-88] in FortiDeceptor WEB UI may allow an authenticated attacker with at least read-only admin permission to read log files via HTTP crafted requests.

Version Affected Solution
FortiDeceptor 6.3 Not affected Not Applicable
FortiDeceptor 6.2 Not affected Not Applicable
FortiDeceptor 6.1 Not affected Not Applicable
FortiDeceptor 6.0 6.0.0 through 6.0.2 Migrate to a fixed release
FortiDeceptor 5.3 5.3.0 through 5.3.3 Migrate to a fixed release
FortiDeceptor 5.2 5.2.0 through 5.2.1 Migrate to a fixed release
FortiDeceptor 5.1 5.1 all versions Migrate to a fixed release
FortiDeceptor 5.0 5.0 all versions Migrate to a fixed release
FortiDeceptor 4.3 Not affected Not Applicable
FortiDeceptor 4.2 Not affected Not Applicable
FortiDeceptor 4.1 Not affected Not Applicable

Acknowledgement

Internally discovered and reported by Adham El karn of Fortinet Product Security team.

Timeline

2026-05-12: Initial publication