Reflected XSS in Operation Center

Summary

An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79] in FortiSandbox and FortiSandbox Cloud may allow an attacker to perform an XSS attack via crafted HTTP requests.

Version Affected Solution
FortiSandbox 5.0 5.0.0 through 5.0.4 Upgrade to 5.0.5 or above
FortiSandbox 4.4 Not affected Not Applicable
FortiSandbox 4.2 Not affected Not Applicable
FortiSandbox PaaS 5.0 5.0.0 through 5.0.4 Upgrade to 5.0.5 or above
FortiSandbox PaaS 4.4 Not affected Not Applicable
FortiSandbox PaaS 4.2 Not affected Not Applicable

Acknowledgement

Internally discovered and reported by William Hsu from Fortinet InfoSec team.

Timeline

2026-04-14: Initial publication