THREATPORT/VULNERABILITY/CVE-2024-39943
CRITICAL SEVERITY

CVE-2024-39943

Http File Server vulnerability

CVSS
9.9
EPSS
48.5%
EPSS pct
99th
Exploited
No known
rejetto HFS (aka HTTP File Server) 3 before 0.52.10 on Linux, UNIX, and macOS allows OS command execution by remote authenticated users (if they have Upload permissions). This occurs because a shell is used to execute df (i.e., with execSync instead of spawnSync in child_process in Node.js).
Affected vendor
Rejetto
Affected product
Http File Server
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Weakness type (CWE)
  • CWE-78 — OS Command Injection
  • CWE-284 — Improper Access Control
Published
2024-07-04

Risk analysis

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

Its EPSS score of 48.5% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it among the most exploited CVEs currently tracked.

Check your external exposure to CVE-2024-39943

  • Confirm whether Rejetto Http File Server is running on any internet-facing host or subdomain.
  • Match discovered service fingerprints against the version affected by CVE-2024-39943.
  • Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2024-39943

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2024-39943 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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