Main Vulnerability Database Vulnerabilities #VU125766

CRLF injection in basic-ftp - #VU125766

Published: April 10, 2026

Vulnerability identifier: #VU125766

CSH Severity: High

CVSS v4: 8.8 [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]

CVE-ID: N/A

CWE-ID: CWE-93

Exploitation vector: Remote access

Exploit availability: Public exploit is available

Vulnerability details

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.

Affected software

basic-ftp

Remediation

Install updates from vendor's website.

basic-ftp - update to 5.2.2

Links to Public Exploits and PoC-codes

Exploit #12565 - Incomplete CRLF Injection Protection Allows Arbitrary FTP Command Execution via Credentials and MKD Commands (April 10, 2026)

External References

https://github.com/patrickjuchli/basic-ftp/security/advisories/GHSA-6v7q-wjvx-w8wg

Related Security Bulletins

CRLF injection in basic-ftp