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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().

PUBLISHED Reserved 2026-05-05 | Published 2026-05-12 | Updated 2026-05-13 | Assigner VulnCheck




HIGH: 7.2CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

HIGH: 8.6CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Problem types

Improper Control of Generation of Code ('Code Injection')

Product status

Default status
unknown

8.1.2 (semver)
affected

8.1.3 (semver)
unaffected

Credits

Ünsal Furkan Harani finder

References

www.vulncheck.com/...ode-execution-via-session-serialization vendor-advisory

www.wftpserver.com/serverhistory.htm release-notes

cve.org (CVE-2026-44403)

nvd.nist.gov (CVE-2026-44403)

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