SB2025072108 - Authentication bypass in CrushFTP
Published: July 21, 2025 Updated: September 12, 2025
Security Bulletin ID
SB2025072108
CSH Severity
Critical
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper authentication (CVE-ID: CVE-2025-54309)
CWE-ID: CWE-287 - Improper Authentication
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red
The vulnerability allows a remote attacker to bypass authentication process.
The vulnerability exists due to improper input validation in AS2 file transfer protocol. A remote attacker can obtain the administrator's session and gain unauthorized access to the server.
Remediation
Install update from vendor's website.
References
- https://www.crushftp.com/crush11wiki/Wiki.jsp?page=CompromiseJuly2025#section-CompromiseJuly2025-CVE202554309
- https://www.bleepingcomputer.com/news/security/crushftp-zero-day-exploited-in-attacks-to-gain-admin-access-on-servers/
- https://www.rapid7.com/blog/post/crushftp-zero-day-exploited-in-the-wild/