Improper Restriction of Excessive Authentication Attempts in firefly-iii/firefly-iii

published 2021-07-25 5 y ago modified 2026-06-17 4 mo ago also GHSA-56cx-wf47-hx7w , EUVD-2021-1572

cvss: 5.3; version 3.0, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits: 0; none known

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

Patch / fix

fixed in 1 links 2

packagist grumpydictator/firefly-iii 5.5.13

Exploit prediction

0.71% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

huntr.dev https://huntr.dev/bounties/497bdf6d-7dba-49c3-8011-1c64dfbb3380 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.0	5.3	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
NVD	3.1	7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:P/I:N/A:N
GitHub	3.0	5.3	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Affected packages

ecosystem	package	affected	fixed in
packagist	grumpydictator/firefly-iii	<5.5.13	5.5.13

Affected products

firefly-iii firefly-iii/firefly-iii

Classification

Weakness

CWE-307 Improper Restriction of Excessive Authentication Attempts

References

github.com /firefly-iii/firefly-iii/commit/afc9f4b7ebc8a240c85864a6e1abda62bfeefae8
web, patch, third-party-advisory
huntr.dev /bounties/497bdf6d-7dba-49c3-8011-1c64dfbb3380
web, exploit, third-party-advisory
nvd.nist.gov /vuln/detail/CVE-2021-3663
advisory
github.com /firefly-iii/firefly-iii
package
github.com /firefly-iii/firefly-iii/releases/tag/5.5.13
web

Sources

CVE List CVE-2021-3663
GitHub Advisory GHSA-56cx-wf47-hx7w
NVD CVE-2021-3663

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary