CVE-2021-3663
Published: 25 July 2021
Summary
CVE-2021-3663 is a high-severity Improper Restriction of Excessive Authentication Attempts (CWE-307) vulnerability in Firefly-Iii Firefly Iii. Its CVSS base score is 7.5 (High).
Operationally, ranked at the 36.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2021-1572
Vulnerability details
firefly-iii is vulnerable to Improper Restriction of Excessive Authentication Attempts
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
This control directly enforces limits on consecutive invalid logon attempts and automatic response (e.g., lockout) to prevent brute-force exploitation of authentication mechanisms.
Specific conditions can include excessive failed attempts, triggering stronger authentication that restricts brute-force exploitation.