CVE-2024-55591
Fortinet FortiOS and FortiProxy: Authentication Bypass
As of , CVE-2024-55591 in Fortinet FortiOS and FortiProxy is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.
- Exploited
- Yes: CISA listed it on 14 January 2025
- US federal deadline
- 21 January 20257 days after CISA listed it. US federal civilian agencies must fix it by then.
- Used in ransomware campaigns
- KnownCISA changed it from Unknown to Known on 18 March 2025.
- EPSS score
- 0.94Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
- EPSS when listed
- No score that dayThe EPSS file of the day CISA listed it has no score for it.
- Public exploit
- None foundNeither Metasploit nor Exploit-DB lists one.
- Fix
- Vendor advice: fortiguard.fortinet.comLinks below, from CISA's entry.
What CISA says to do
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA's required action
What the flaw is
Fortinet FortiOS and FortiProxy contain an authentication bypass vulnerability that may allow an unauthenticated, remote attacker to gain super-admin privileges via crafted requests to Node.js websocket module.
CISA's description
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.
The CVE record's description, from fortinet
- CVE published
- 14 January 2025
- Assigned by
- fortinet
- CVSS
- 9.6 Critical (CVSS 3.1, from the CNA)
- CWE-288
- Authentication Bypass Using an Alternate Path or Channel
- CISA SSVC, exploitation
- active
- CISA SSVC, automatable
- yes
- CISA SSVC, technical impact
- total
Timeline
- The CVE record was published.
- CISA added it to its list of exploited vulnerabilities.
- The US federal deadline to fix it.
- CISA changed its entry. Ransomware use: Unknown to Known.
FortiOS and FortiProxy: other exploited entries
| Vulnerability | Product | Our group | Listed | Deadline | EPSS |
|---|---|---|---|---|---|
| CVE-2018-13382Improper Authorization | Fortinet FortiOS and FortiProxy | Patch this weekRansomware use; EPSS 0.82 | 0.82 | ||
| CVE-2018-13383Out-of-bounds Write | Fortinet FortiOS and FortiProxy | Patch this weekRansomware use | 0.34 | ||
| CVE-2025-24472Authentication Bypass | Fortinet FortiOS and FortiProxy | Patch this weekRansomware use | 0.07 |
Read further
- CVE recordcve.org
- NVD entrynvd.nist.gov
- CISA's catalogcisa.gov
- EPSS for this CVEapi.first.org