What’s Vulnerable › Vulnerabilities

CVE-2021-3378

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 97.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-02-01 · updated 2026-06-17
• Weakness: CWE-434

Description

FortiLogger 4.4.2.2 is affected by Arbitrary File Upload by sending a "Content-Type: image/png" header to Config/SaveUploadedHotspotLogoFile and then visiting Assets/temp/hotspot/img/logohotspot.asp.

Affected products

• Fortilogger: before 5.2.0 — fixed in 5.2.0

How to fix

Upgrade to a fixed version: Fortilogger 5.2.0. Check the vendor advisory for mitigations.

References

• http://packetstormsecurity.com/files/161601/FortiLogger-4.4.2.2-Arbitrary-File-Upload.html
• http://packetstormsecurity.com/files/161974/FortiLogger-Arbitrary-File-Upload.html
• https://github.com/erberkan/fortilogger_arbitrary_fileupload
• http://packetstormsecurity.com/files/161601/FortiLogger-4.4.2.2-Arbitrary-File-Upload.html
• http://packetstormsecurity.com/files/161974/FortiLogger-Arbitrary-File-Upload.html
• https://github.com/erberkan/fortilogger_arbitrary_fileupload

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