RCE in Rejetto HTTP File Server

CVE-2024-39943

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).

Vulnerability class: Command Injection (OS Command Injection)

Published · last modified .

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.395 (98.6th percentile), scored .

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 99th percentile — 98.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2024-39943: rose from 0.375 to 0.395.

EPSS over last 30 days · oldest: 0.375 · newest: 0.395 · change: +0.020

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

References

Frequently asked questions

What is CVE-2024-39943?
CVE-2024-39943 is a critical-severity vulnerability in Rejetto HTTP File Server, classified under OS Command Injection. CVSS score: 9.9/10. Published 2024-07-04.
How severe is CVE-2024-39943?
Critical severity. CVSS v3 base score is 9.9 out of 10.
Is CVE-2024-39943 known to be exploited?
32 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.