CVE-2026-44403

HIGH CVSS 4.0: 8.6 EPSS 2.64%
Updated Jun 17, 2026
Wftpserver
Parameter Value
CVSS 8.6 (HIGH)
Affected Versions before 8.1.3
Fixed In 8.1.3
Type CWE-94 (Code Injection)
Vendor Wftpserver
Public PoC No

Wing FTP Server before 8.1.3 contains an authenticated remote code execution vulnerability in the session serialization mechanism that allows authenticated administrators to inject arbitrary Lua code through the domain admin mydirectory field. Attackers can exploit unsafe serialization of session values into Lua source code without proper escaping of closing delimiters, causing the injected code to be executed when the poisoned session is loaded via loadfile().

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
High
Admin privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v4.0

Weakness Type (CWE)

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Wftpserver Wing_Ftp_Server
cpe:2.3:a:wftpserver:wing_ftp_server:*:*:*:*:*:*:*:*
8.1.3