What’s Vulnerable › Vulnerabilities

CVE-2021-3846: Unrestricted Upload of File with Dangerous Type in firefly-iii/firefly-iii

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-10-19 · updated 2026-06-17
• Weakness: CWE-434

Description

firefly-iii is vulnerable to Unrestricted Upload of File with Dangerous Type

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/a85b6420c19ace35134f896e094e1971d8c7954b
• https://huntr.dev/bounties/5267ec1c-d204-40d2-bd4f-6c2dd495ee18
• https://github.com/firefly-iii/firefly-iii/commit/a85b6420c19ace35134f896e094e1971d8c7954b
• https://huntr.dev/bounties/5267ec1c-d204-40d2-bd4f-6c2dd495ee18

Get alerted when CVE-2021-3846 or the next vulnerability affects your stack