What’s Vulnerable › Vulnerabilities

CVE-2024-4040: CrushFTP VFS Sandbox Escape Vulnerability

• Severity: critical (CVSS 10.0 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2024-04-24
• EPSS: 99.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-04-22 · updated 2026-06-17
• Weakness: CWE-1336

Description

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.

Affected products

• CrushFTP: from 10.0.0 before 10.7.1; from 11.0.0 before 11.1.0 — fixed in 10.7.1, 11.1.0

How to fix

Upgrade to a fixed version: CrushFTP 10.7.1, 11.1.0. Check the vendor advisory for mitigations.

References

• https://github.com/airbus-cert/CVE-2024-4040
• https://www.bleepingcomputer.com/news/security/crushftp-warns-users-to-patch-exploited-zero-day-immediately/
• https://www.crushftp.com/crush10wiki/Wiki.jsp?page=Update
• https://www.crushftp.com/crush11wiki/Wiki.jsp?page=Update
• https://www.rapid7.com/blog/post/2024/04/23/etr-unauthenticated-crushftp-zero-day-enables-complete-server-compromise/
• https://www.reddit.com/r/crowdstrike/comments/1c88788/situational_awareness_20240419_crushftp_virtual/
• https://www.reddit.com/r/cybersecurity/comments/1c850i2/all_versions_of_crush_ftp_are_vulnerable/
• https://github.com/airbus-cert/CVE-2024-4040
• https://www.bleepingcomputer.com/news/security/crushftp-warns-users-to-patch-exploited-zero-day-immediately/
• https://www.crushftp.com/crush10wiki/Wiki.jsp?page=Update
• https://www.crushftp.com/crush11wiki/Wiki.jsp?page=Update
• https://www.rapid7.com/blog/post/2024/04/23/etr-unauthenticated-crushftp-zero-day-enables-complete-server-compromise/

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