CVE-2023-33305: Fortinet FortiOS

Medium severity, CVSS 6.5. EPSS: 0.8% chance of exploitation in the next 30 days.

A loop with unreachable exit condition ('infinite loop') in Fortinet FortiOS version 7.2.0 through 7.2.4, FortiOS version 7.0.0 through 7.0.10, FortiOS 6.4 all versions, FortiOS 6.2 all versions, FortiOS 6.0 all versions, FortiProxy version 7.2.0 through 7.2.3, FortiProxy version 7.0.0 through 7.0.9, FortiProxy 2.0 all versions, FortiProxy 1.2 all versions, FortiProxy 1.1 all versions, FortiProxy 1.0 all versions, FortiWeb version 7.2.0 through 7.2.1, FortiWeb version 7.0.0 through 7.0.6, FortiWeb 6.4 all versions, FortiWeb 6.3 all versions allows attacker to perform a denial of service via specially crafted HTTP requests.

Affected products

• Fortinet FortiOS: from 5.0.0, up to and including 5.0.14; from 5.2.0, up to and including 5.2.15; from 5.4.0, up to and including 5.4.13; from 5.6.0, up to and including 5.6.14; from 6.0.0, up to and including 6.0.17; from 6.2.0, up to and including 6.2.15; …
• Fortinet FortiProxy: from 1.0.0, up to and including 1.0.7; from 1.1.0, up to and including 1.1.6; from 1.2.0, up to and including 1.2.13; from 2.0.0, up to and including 2.0.12; from 7.0.0, up to and including 7.0.9; from 7.2.0, up to and including 7.2.3
• Fortinet FortiWeb: from 6.3.0, up to and including 6.3.23; from 6.4.0, up to and including 6.4.3; from 7.0.0, up to and including 7.0.6; version 7.2.0 only; version 7.2.1 only

Published 2023-06-13. Last modified 2026-06-17.