CVE-2021-3730

Name: CVE-2021-3730
Creator: NVD / NIST
Published: 2021-08-23T13:15:07.953+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.47%

Last modified Jun 17, 2026

CVE-2021-3730 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. firefly-iii is vulnerable to Cross-Site Request Forgery (CSRF). EPSS estimates a 0.47% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

6.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

EPSS Probability

0.47%

37.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Firefly-Iii	Firefly Iii	All versions

References

https://github.com/firefly-iii/firefly-iii/commit/f80178b1b2b7864d17500a131d570c353c9a26f6Patch, Third Party Advisory
https://huntr.dev/bounties/ea181323-51f8-46a2-a60f-6a401907feb7Third Party Advisory
https://github.com/firefly-iii/firefly-iii/commit/f80178b1b2b7864d17500a131d570c353c9a26f6Patch, Third Party Advisory
https://huntr.dev/bounties/ea181323-51f8-46a2-a60f-6a401907feb7Third Party Advisory

Timeline

Published: Aug 23, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-3730?

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

How severe is CVE-2021-3730?

CVE-2021-3730 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.47% probability of exploitation in the next 30 days.

How do I fix CVE-2021-3730?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-3730?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST