Cross-Site Request Forgery in firefly-iii

MEDIUM 6.5CVE-2021-3900 · GHSA-pfj7-w373-gqch · Published 27/10/2021 · updated 17/06/2026

In short

CVE-2021-3900 is a MEDIUM (CVSS 6.5) vulnerability affecting grumpydictator/firefly-iii, firefly iii (firefly-iii).
Chance of exploitation in the next 30 days (EPSS): 0.55%, higher than 46.1% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
grumpydictator/firefly-iii Packagist	`≤ 5.6.2`	No fix yet
firefly iii firefly-iii	`≤ 5.6.2`	No fix yet

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

NVD description

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

Running one of these products? Scan your site to see whether it exposes a vulnerable version.

Package

Affected versions

Patched versions

Packagist

≤ 5.6.2

No fix yet

≤ 5.6.2

No fix yet

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