Is CVE-2023-33305 being actively exploited?

CVE-2023-33305 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2023-33305?

CVE-2023-33305 has a CVSS 3.1 base score of 4.9 (MEDIUM).

CVE-2023-33305

MEDIUM · CVSS 4.9EPSS 0.8%EU EUVD

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.

Key facts

CVSS score: 4.9 (v3.1)
Severity: MEDIUM
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): CWE-835
EPSS score: 0.8% (57th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2023-37468)
Published: June 13, 2023
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2023-37468 in the EU Vulnerability Database. Last updated in EUVD on October 22, 2024.

View on the EU Vulnerability Database

Affected products

fortinet / fortios
fortinet / fortiproxy
fortinet / fortiweb
fortinet / fortiweb
fortinet / fortiweb

Certified products that may be affected

6 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Fortinet, Inc. FortiOS 7.0.7 - Fortinet, Inc. - Common Criteria NSCIB-CC-0590233-CR - active
FortiGate/FortiOS Version 6.2.7 - Fortinet, Inc. - Common Criteria 559-LSS - archived
FortiOS 5.6 - Fortinet, Inc. - FIPS 140 3639 - historical
FortiProxy-400E/2000E/4000E - Fortinet, Inc. - FIPS 140 3628 - historical
Fortinet FortiProxy v1.0 - Fortinet, Inc. - Common Criteria 383-4-475 - archived

See all 6 in the Security Certifications Explorer.

References

https://fortiguard.com/psirt/FG-IR-22-375(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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