What’s Vulnerable › Vulnerabilities

CVE-2021-3921: Cross-Site Request Forgery (CSRF) in firefly-iii/firefly-iii

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-11-13 · updated 2026-06-17
• Weakness: CWE-352

Description

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

Affected products

• firefly-iii/firefly-iii: before 5.6.3 — fixed in 5.6.3

How to fix

Upgrade to a fixed version: firefly-iii/firefly-iii 5.6.3. Check the vendor advisory for mitigations.

References

• https://github.com/firefly-iii/firefly-iii/commit/47fa9e39561a9ec9e210e4023d090a7b33381684
• https://huntr.dev/bounties/724d3fd5-9f04-45c4-98d6-35a7d15468f5
• https://github.com/firefly-iii/firefly-iii/commit/47fa9e39561a9ec9e210e4023d090a7b33381684
• https://huntr.dev/bounties/724d3fd5-9f04-45c4-98d6-35a7d15468f5

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