CVE-2021-3663: Firefly-Iii Firefly Iii

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

firefly-iii is vulnerable to Improper Restriction of Excessive Authentication Attempts

Affected products

• Firefly-Iii Firefly Iii: up to and including 5.5.12

Published 2021-07-25. Last modified 2026-06-17.