CrushFTP VFS Sandbox Escape Vulnerability
CrushFTP — CrushFTP
A server side template injection vulnerability in CrushFTP in all versions before 10.7.1 and 11.1.0 on all platforms allows unauthenticated remote attackers to read files from the filesystem outside of the VFS Sandbox, bypass authentication to gain administrative access, and perform remote code execution on the server.
9.8
99.5%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Published
- Apr 22, 2024
- Modified
- Oct 21, 2025
- Added to KEV
- Apr 24, 2024
- Federal patch due
- May 1, 2024
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2024-4040, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit — cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2024-4040 were found at last check. Absence here is not proof no exploit exists — see the references below for vendor advisories and write-ups.
References
How this class of flaw gets exploited
Frequently asked questions
What is CVE-2024-4040?
A server side template injection vulnerability in CrushFTP in all versions before 10.7.1 and 11.1.0 on all platforms allows unauthenticated remote attackers to read files from the filesystem outside of the VFS Sandbox, bypass authentication to gain administrative access, and perform remote code execution on the server.
How severe is CVE-2024-4040?
CVE-2024-4040 has a CVSS base score of 9.8 out of 10 (CVSS 3.1).
Is CVE-2024-4040 actively exploited in the wild?
Yes. CVE-2024-4040 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Apr 24, 2024, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2024-4040?
99.5% - meaning FIRST.org's EPSS model estimates a 99.5% probability this vulnerability will be exploited in the wild within 30 days (100% percentile among all scored CVEs).
Is there exploit tooling available for CVE-2024-4040?
Yes - a public Nuclei template referencing CVE-2024-4040 exist in public repositories we checked.
What type of vulnerability is CVE-2024-4040?
CVE-2024-4040 is classified under CWE-1336 (CWE-1336 Improper Neutralization of Special Elements Used in a Template Engine).
Cross-checked against
Impactr finds and proves whether CVE-2024-4040 — or flaws like it — are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.