CVE-2026-44403 Details
Description
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().
A remote code execution vulnerability has been identified in Wing FTP Server version 8.1.2. This issue arises from the session serialization process, which allows authenticated administrators to inject arbitrary Lua code through the domain admin mydirectory field. The vulnerability exploits the unsafe serialization of session values into Lua source code, as closing delimiters are not properly escaped. Consequently, the injected code is executed when the compromised session is loaded using the loadfile() function.
Users can upgrade to Wing FTP Server version 8.1.3 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed May 13, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://www.vulncheck.com/advisories/wing-ftp-server-authenticated-remote-code-execution-via-session-serialization | [email protected] | Third Party Advisory |
| https://www.wftpserver.com/serverhistory.htm | [email protected] | ProductRelease Notes |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-94 | Improper Control of Generation of Code ('Code Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| wftpserver wing ftp server | < 8.1.3 |
CPE
Remediation
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Change History
6 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 14, 2026 | Initial Analysis | [email protected] |
| May 13, 2026 | CVE Modified | [email protected] |
| May 12, 2026 | CVE Modified | [email protected] |
| May 12, 2026 | New CVE Received | [email protected] |