CVE-2021-3846

Unrestricted Upload of File with Dangerous Type in firefly-iii/firefly-iii

6.3 MediumFix available

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

Attack profile

How easy it is to exploit

Attack vector: Local
Complexity: High
Privileges needed: High
User interaction: Required

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

0.78%Up 0.2 points since Oct 20, 2021

What each source reports

CVE List Score used 6.3

Unrestricted Upload of File with Dangerous Type in firefly-iii/firefly-iii

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

Record: CVE-2021-3846
CVSS 3.0: 6.3 MediumCVSS:3.0/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
Weakness: CWE-434
Updated: 2026-11-02

EUVDEUVD-2022-2585 6.3

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

Record: EUVD-2022-2585
CVSS 3.0: 6.3 MediumCVSS:3.0/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
Updated: 2026-11-03

GitHub AdvisoriesGHSA-5gq7-826w-8282 8.8

Unrestricted File Upload vulnerability in Firefly III

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

Record: GHSA-5gq7-826w-8282
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-434
Updated: 2026-11-02

NVD 8.8

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

Record: CVE-2021-3846
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 3.0: 6.3 MediumCVSS:3.0/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
CVSS 2.0: 6.5 MediumAV:N/AC:L/Au:S/C:P/I:P/A:P
Weakness: CWE-434
Updated: 2026-11-02

OSV 8.8

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

Record: CVE-2021-3846
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

OSVGHSA-5gq7-826w-8282 8.8

Unrestricted File Upload vulnerability in Firefly III

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

Record: GHSA-5gq7-826w-8282
CVSS 3.1: 8.8 HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-434
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`grumpydictator/firefly-iii` Packagist	before 5.6.2	5.6.2
`grumpydictator/firefly-iii` Packagist	before 5.6.2, plus listed versions 3.0.03.0.13.0.23.0.33.1 Show 45 moreShow less 3.1.13.1.23.1.33.1.43.1.53.1.63.103.10.13.10.23.10.33.10.43.2.03.2.13.2.23.2.33.2.43.2.53.33.3.13.3.23.3.33.3.43.3.53.3.63.3.73.3.83.3.93.43.4.0.13.4.0.103.4.0.23.4.0.33.4.0.43.4.0.53.4.0.63.4.0.73.4.0.83.4.0.93.4.13.4.103.4.113.4.23.4.33.4.43.4.4.1	5.6.2

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-3846 is a medium vulnerability (CVSS 6.3) in Firefly-iii Firefly-iii/firefly-iii, published October 19, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.78%, the 56th percentile. Fixed in grumpydictator/firefly-iii 5.6.2.

References

This page doesn't list everything

Left out here: 198 versions. The JSON record has them.