CRLF injection in basic-ftp - #VU125766
Published: April 10, 2026
Vulnerability identifier: #VU125766
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N/E:P/U:Amber
CVE-ID: N/A
CWE-ID: CWE-93
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: patrickjuchli
Affected software:
basic-ftp
basic-ftp
Detailed vulnerability description
The vulnerability allows a remote attacker to inject arbitrary data in server response.
The vulnerability exists due to insufficient validation of attacker-supplied data within credentials and MKD commands. A remote attacker can pass specially crafted data to the application containing CR-LF characters and modify application behavior.
Remediation
Install updates from vendor's website.