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Fencer Vulns
medium 6.3

CVE-2021-3846 json

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

published 2021-10-19 5 y ago modified 2026-06-17 4 mo ago also GHSA-5gq7-826w-8282 , EUVD-2022-2585

cvss
6.3
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

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

Patch / fix

  • packagist grumpydictator/firefly-iii 5.6.2
  • firefly-iii firefly-iii/firefly-iii 5.6.2

Exploit prediction

0.78% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • huntr.dev https://huntr.dev/bounties/5267ec1c-d204-40d2-bd4f-6c2dd495ee18 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.0 6.3 CVSS:3.0/AV:L/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P
GitHub 3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
packagist grumpydictator/firefly-iii
<5.6.2
5.6.2

Affected products

  • firefly-iii firefly-iii/firefly-iii

Classification

Weakness
  • CWE-434 Unrestricted Upload of File with Dangerous Type

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.