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critical·Network Vulnerabilities·Updated Apr 30, 2026

ProFTPD mod_sql - Preauth User Backdoor

Est. Time~10 seconds
Scan TypeGroup Scan
Targetsdomain, subdomain, ipv4
CostFree
18
Times Used
continuous scan runs
9
Continuously Checked
assets under CS
0
Vulnerabilities Found
confirmed findings
References
8.1
CVSShigh
Exploitable remotely over the internet · no authentication required.
Description

mod_sql in ProFTPD before 1.3.9a allows remote attackers to execute arbitrary code via a username, in scenarios where there is logging of USER requests with an expansion such as %U, and the SQL backend allows commands (e.g., COPY TO PROGRAM).

Attack Vector
Network
Privileges Req.
None
User Interaction
None
Affected
ProFTPDby ProFTPD
AFFECTED< 1.3.9a→SAFE ✓≥ 1.3.9a
Updated Nov 10, 2026View on NVD →
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