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Fencer Intel
critical 9.8

CVE-2021-43421 in the critical feed json

elFinder Unrestricted File Upload vulnerability

published 4y ago modified 4mo ago also GHSA-x4jx-hjwf-gc99 , EUVD-2022-1864

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
42.8%
EPSS 42.8% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known, plus a Nuclei check

Summary

A File Upload vulnerability exists in Studio-42 elFinder 2.0.4 to 2.1.59 via connector.minimal.php, which allows a remote malicious user to upload arbitrary files and execute PHP code.

Patch / fix

  • packagist studio-42/elfinder 2.1.60

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Exploit prediction

42.78% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • Nuclei template Studio-42 elFinder <2.1.60 - Arbitrary File Upload nuclei detection template
  • github.com https://github.com/Studio-42/elFinder/issues/3429 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P
GitHub 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
packagist studio-42/elfinder
>=2.0.4, <2.1.60
2.1.60

Classification

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

References

Sources

Fencer Intel 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.