THREATPORT/VULNERABILITY/CVE-2021-23394
HIGH SEVERITY

CVE-2021-23394

Elfinder vulnerability

CVSS
8.1
EPSS
19.1%
EPSS pct
97th
Exploited
No known
The package studio-42/elfinder before 2.1.58 are vulnerable to Remote Code Execution (RCE) via execution of PHP code in a .phar file. NOTE: This only applies if the server parses .phar files as PHP.
Affected vendor
Std42
Affected product
Elfinder
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-434 — Unrestricted Upload of File with Dangerous Type
Published
2021-06-13

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 19.1% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 97% of all scored CVEs.

Check your external exposure to CVE-2021-23394

  • Confirm whether Std42 Elfinder is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2021-23394.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-23394

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-23394 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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