CVE-2021-3819: Firefly-Iii Firefly Iii

High severity, CVSS 8.8. EPSS: 0.5% chance of exploitation in the next 30 days.

firefly-iii is vulnerable to Cross-Site Request Forgery (CSRF)

Affected products

• Firefly-Iii Firefly Iii: before 5.6.1 (fixed in 5.6.1)

Published 2021-09-27. Last modified 2026-06-17.