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TI-2021-02782 Aliases CVE-2021-3851GHSA-5fvx-5p2r-4mvp

Open Redirect in firefly-iii/firefly-iii

Priority LOW 25CWE-601Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-601.

Summary

firefly-iii is vulnerable to URL Redirection to Untrusted Site

Why it matters now

EPSS 0.00571 47th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed firefly-iii/firefly-iii (firefly-iii): 5.6.2grumpydictator/firefly-iii (Packagist): 5.6.2

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
firefly-iiifirefly-iii/firefly-iiibefore 5.6.25.6.2Patch availableCNA
—grumpydictator/firefly-iii (Packagist)before 5.6.25.6.2Patch availableGHSA-5fvx-5p2r-4mvp
  • firefly-iii/firefly-iii Vendorfirefly-iii Affected before 5.6.2 Fixed in 5.6.2 Patch available CNA
  • grumpydictator/firefly-iii (Packagist) Vendor— Affected before 5.6.2 Fixed in 5.6.2 Patch available GHSA-5fvx-5p2r-4mvp

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:firefly-iii:firefly_iii:*:*:*:*:*:*:*:*before 5.6.2Vulnerablefirefly-iii
  • cpe:2.3:a:firefly-iii:firefly_iii:*:*:*:*:*:*:*:* Versions before 5.6.2 Vulnerable ·firefly-iii

Remediation

  • Fix · CNA firefly-iii/firefly-iii (firefly-iii) Fixed in 5.6.2
  • Fix · GHSA-5fvx-5p2r-4mvp grumpydictator/firefly-iii (Packagist) Fixed in 5.6.2 Advisory →

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    firefly-iii/firefly-iii 5.6.2

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2021-02777 Unrestricted Upload of File with Dangerous Type in firefly-iii/firefly-iiiPriority LOW 39
    Show all 2 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-3851
  2. 2026-10-03 Alias added: GHSA-5fvx-5p2r-4mvp

References

Exploit 1

Patch 1

Advisory 1

Other 1

  • TI-2023-01681 Improper Input Validation in firefly-iii/firefly-iii CVSS 3.1CRITICAL 9.8
  • TI-2023-01680 Insufficient Session Expiration in firefly-iii/firefly-iii CVSS 3.1CRITICAL 9.8
  • TI-2023-00283 Incorrect Authorization in firefly-iii/firefly-iii CVSS 3.1MEDIUM 6.5
  • TI-2019-10251 Firefly III before 4.7.17.1 is vulnerable to stored XSS due to lack of filtration of… CVSS 3.1MEDIUM 5.4
  • TI-2021-02811 Cross-Site Request Forgery (CSRF) in firefly-iii/firefly-iii CVSS 3.1HIGH 8.8
  • TI-2021-02777 Unrestricted Upload of File with Dangerous Type in firefly-iii/firefly-iii CVSS 3.1HIGH 8.8
See all 25 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences