CVE-2023-45583

CVE-2023-45583 is a medium-severity vulnerability in Fortinet Fortiproxy with a CVSS 3.x base score of 6.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-134.

Key facts

• Severity: Medium (CVSS 3.x base score 6.7)
• EPSS exploit prediction: 1% (47th percentile)
• Actively exploited: Not listed in CISA KEV
• EU (EUVD) id: EUVD-2023-49875
• Weakness: CWE-134
• Affected product: Fortinet Fortiproxy
• Published: 2024-05-14
• Last modified: 2026-06-17

Description

A use of externally-controlled format string vulnerability in Fortinet FortiOS 7.4.0, FortiOS 7.2.0 through 7.2.5, FortiOS 7.0 all versions, FortiOS 6.4 all versions, FortiOS 6.2 all versions, FortiOS 6.0.0 through 6.0.16, FortiPAM 1.1.0, FortiPAM 1.0 all versions, FortiProxy 7.2.0 through 7.2.5, FortiProxy 7.0.0 through 7.0.11, FortiProxy 2.0 all versions, FortiProxy 1.2 all versions, FortiProxy 1.1 all versions, FortiProxy 1.0 all versions, FortiSwitchManager 7.2.0 through 7.2.2, FortiSwitchManager 7.0.0 through 7.0.2 allows attacker to execute unauthorized code or commands via specially crafted cli commands and http requests.

Frequently asked questions

What is CVE-2023-45583?

A use of externally-controlled format string vulnerability in Fortinet FortiOS 7.4.0, FortiOS 7.2.0 through 7.2.5, FortiOS 7.0 all versions, FortiOS 6.4 all versions, FortiOS 6.2 all versions, FortiOS 6.0.0 through 6.0.16, FortiPAM 1.1.0, FortiPAM 1.0 all versions, FortiProxy 7.2.0 through 7.2.5, FortiProxy 7.0.0 through 7.0.11, FortiProxy 2.0 all versions, FortiProxy 1.2 all versions, FortiProxy 1.1 all versions, FortiProxy 1.0 all versions, FortiSwitchManager 7.2.0 through 7.2.2, FortiSwitchManager 7.0.0 through 7.0.2 allows attacker to execute unauthorized code or commands via specially crafted cli commands and http requests.

How severe is CVE-2023-45583?

CVE-2023-45583 has a CVSS 3.x base score of 6.7, rated medium severity. It is exploitable over local access with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2023-45583 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (47th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-45583?

CVE-2023-45583 primarily affects Fortinet Fortiproxy. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-45583?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2023-45583 have an EU (EUVD) identifier?

Yes. CVE-2023-45583 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2023-49875.

When was CVE-2023-45583 published?

CVE-2023-45583 was published on 2024-05-14 and last updated on 2026-06-17.

References

• https://fortiguard.com/psirt/FG-IR-23-137

Affected products (6)

• cpe:2.3:a:fortinet:fortiproxy:*:*:*:*:*:*:*:*
• cpe:2.3:a:fortinet:fortiswitchmanager:*:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:*:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortios:7.4.0:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortipam:*:*:*:*:*:*:*:*
• cpe:2.3:o:fortinet:fortipam:1.1.0:*:*:*:*:*:*:*

More vulnerabilities in Fortinet Fortiproxy

• CVE-2026-24858 — Critical (CVSS 9.8): An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] vulnerability in Fortinet…
• CVE-2025-59718 — Critical (CVSS 9.8): A improper verification of cryptographic signature vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0…
• CVE-2025-22252 — Critical (CVSS 9.8): A missing authentication for critical function in Fortinet FortiProxy versions 7.6.0 through 7.6.1, FortiSwitchManager…
• CVE-2023-25610 — Critical (CVSS 9.8): A buffer underwrite ('buffer underflow') vulnerability in the administrative interface of Fortinet FortiOS version…
• CVE-2024-55591 — Critical (CVSS 9.8): An Authentication Bypass Using an Alternate Path or Channel vulnerability [CWE-288] affecting FortiOS version 7.0.0…
• CVE-2023-42789 — Critical (CVSS 9.8): A out-of-bounds write in Fortinet FortiOS 7.4.0 through 7.4.1, 7.2.0 through 7.2.5, 7.0.0 through 7.0.12, 6.4.0 through…

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Other CWE-134 vulnerabilities

• CVE-2012-1851 — Critical (CVSS 10.0): Format string vulnerability in the Print Spooler service in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2,…
• CVE-2012-0242 — Critical (CVSS 10.0): Format string vulnerability in Advantech/BroadWin WebAccess before 7.0 allows remote attackers to execute arbitrary…
• CVE-2011-2475 — Critical (CVSS 10.0): Format string vulnerability in ECTrace.dll in the iMailGateway service in the Internet Mail Gateway in OneBridge Server…
• CVE-2011-1568 — Critical (CVSS 10.0): Format string vulnerability in the logText function in shmemmgr9.dll in IGSSdataServer.exe 9.00.00.11074, and…
• CVE-2010-4235 — Critical (CVSS 10.0): Format string vulnerability in RealNetworks Helix Server 12.x, 13.x, and 14.x before 14.2, and Helix Mobile Server…
• CVE-2011-0270 — Critical (CVSS 10.0): Format string vulnerability in nnmRptConfig.exe in HP OpenView Network Node Manager (OV NNM) 7.51 and 7.53 allows…

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