CVE-2023-40044

high

Description

In WS_FTP Server versions prior to 8.7.4 and 8.8.2, a pre-authenticated attacker could leverage a .NET deserialization vulnerability in the Ad Hoc Transfer module to execute remote commands on the underlying WS_FTP Server operating system.

From the Tenable Blog

CVE-2023-40044, CVE-2023-42657: Progress Software Patches Multiple Vulnerabilities in WS_FTP Server

Published: 2023-10-02

Progress Software patches multiple flaws in its WS_FTP Server product, including a pair of critical flaws, one with a maximum CVSS rating of 10

References

https://www.theregister.com/2023/10/02/ws_ftp_update/

https://community.progress.com/s/article/WS-FTP-Server-Critical-Vulnerability-September-2023

https://censys.com/cve-2023-40044/

https://attackerkb.com/topics/bn32f9sNax/cve-2023-40044

https://www.bleepingcomputer.com/news/security/ransomware-attacks-now-target-unpatched-ws-ftp-servers/

https://therecord.media/progress-new-file-transfer-vulnerability

https://www.tenable.com/blog/cve-2023-40044-cve-2023-42657-progress-software-patches-multiple-vulnerabilities-in-ws-ftp

https://github.com/kenbuckler/WS_FTP-CVE-2023-40044

https://www.progress.com/ws_ftp

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-40044

https://www.assetnote.io/resources/research/rce-in-progress-ws-ftp-ad-hoc-via-iis-http-modules-cve-2023-40044

https://euvd.enisa.europa.eu/vulnerability/EUVD-2023-44651

http://packetstormsecurity.com/files/174917/Progress-Software-WS_FTP-Unauthenticated-Remote-Code-Execution.html

Details

Source: Mitre, NVD

Published: 2023-09-27

Updated: 2026-06-17

Known Exploited Vulnerability (KEV)

Risk Information

CVSS v2

Base Score: 9

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.8

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