---
id: CVE-2024-55591
title: "An\_Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] affecting FortiOS version 7.0.0 through 7.0.16 and FortiProxy version 7.0.0 through 7.0.19 and 7.2.0 through 7.2.12 allows a remote attacker to gain supe…"
summary: "An\_Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] affecting FortiOS version 7.0.0 through 7.0.16 and FortiProxy version 7.0.0 through 7.0.19 and 7.2.0 through 7.2.12 allows a remote attacker to gain supe…"
severity: critical
cvss: 9.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-288
vendor: fortinet
product: fortiproxy
affected:
  - 'fortiproxy >= 7.0.0, < 7.0.20'
  - 'fortiproxy >= 7.2.0, < 7.2.13'
  - 'fortios >= 7.0.0, < 7.0.17'
patched:
  - fortiproxy 7.2.13
  - fortios 7.0.17
published: '2025-01-14'
updated: '2026-07-08'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-55591'
references:
  - url: 'https://fortiguard.fortinet.com/psirt/FG-IR-24-535'
    label: psirt@fortinet.com
  - url: >-
      https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-55591
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - kev
  - in-the-wild
  - exploit-available
epss: 0.94149
epssPercentile: 0.99846
kev: true
kevDateAdded: '2025-01-14'
kevDueDate: '2025-01-21'
kevRansomware: true
exploited: true
zeroDay: true
ingestedAt: '2026-07-08T14:51:15.607Z'
exploits:
  github: 9
  githubRepos:
    - 'https://github.com/watchtowrlabs/fortios-auth-bypass-check-CVE-2024-55591'
    - 'https://github.com/sysirq/fortios-auth-bypass-poc-CVE-2024-55591'
    - 'https://github.com/sysirq/fortios-auth-bypass-exploit-CVE-2024-55591'
  nuclei:
    - CVE-2024-55591
  checkedAt: '2026-09-25T08:20:44.155Z'
exploitAvailable: true
---

## Overview

An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] affecting FortiOS version 7.0.0 through 7.0.16 and FortiProxy version 7.0.0 through 7.0.19 and 7.2.0 through 7.2.12 allows a remote attacker to gain super-admin privileges via crafted requests to Node.js websocket module.

## Affected

- `fortiproxy >= 7.0.0, < 7.0.20`
- `fortiproxy >= 7.2.0, < 7.2.13`
- `fortios >= 7.0.0, < 7.0.17`

## Remediation

Upgrade past the affected range:

- `fortiproxy 7.2.13`
- `fortios 7.0.17`