CVE-2021-3900

Public Exploit
Cross-Site Request Forgery (CSRF) in firefly-iii/firefly-iii

Description

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

Category

6.5
CVSS
Severity: Medium
CVSS 3.1 •
CVSS 3.0 •
CVSS 2.0 •
EPSS 0.06%
Third-Party Advisory github.com Third-Party Advisory huntr.dev
Affected: firefly-iii firefly-iii/firefly-iii
Published at:
Updated at:

References

Link Tags
https://huntr.dev/bounties/909e55b6-ef02-4143-92e4-bc3e8397db76 third party advisory exploit
https://github.com/firefly-iii/firefly-iii/commit/c2c8c42ef3194d1aeba8c48240fe2e9063f77635 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-3900?
CVE-2021-3900 has been scored as a medium severity vulnerability.
How to fix CVE-2021-3900?
To fix CVE-2021-3900, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-3900 being actively exploited in the wild?
It is possible that CVE-2021-3900 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-3900?
CVE-2021-3900 affects firefly-iii firefly-iii/firefly-iii.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.