What’s Vulnerable › Vulnerabilities

CVE-2021-3851: Open Redirect in firefly-iii/firefly-iii

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-10-19 · updated 2026-06-17
• Weakness: CWE-601

Description

firefly-iii is vulnerable to URL Redirection to Untrusted Site

Affected products

• firefly-iii/firefly-iii: before 5.6.2 — fixed in 5.6.2

How to fix

Upgrade to a fixed version: firefly-iii/firefly-iii 5.6.2. Check the vendor advisory for mitigations.

References

• https://github.com/firefly-iii/firefly-iii/commit/8662dfa4c0f71efef61c31dc015c6f723db8318d
• https://huntr.dev/bounties/549a1040-9b5e-420b-9b80-20700dd9d592
• https://github.com/firefly-iii/firefly-iii/commit/8662dfa4c0f71efef61c31dc015c6f723db8318d
• https://huntr.dev/bounties/549a1040-9b5e-420b-9b80-20700dd9d592

Get alerted when CVE-2021-3851 or the next vulnerability affects your stack