CVE-2023-40044
WS_FTP Server Ad Hoc Transfer Module .NET Deserialization Vulnerability
- State
- Published
- Severity
- 10.0 Critical
- Published
- Sep 27, 2023
- Updated
- Oct 21, 2025
- Reserved
- Aug 8, 2023
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 10.0 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | ProgressSoftware |
Weaknesses
- CWE-502 Deserialization of Untrusted Data
Affected Products
| Product | Versions |
|---|---|
WS_FTP ServerProgress Software Corporation |
|
References
- https://www.progress.com/ws_ftpproduct
- https://community.progress.com/s/article/WS-FTP-Server-Critical-Vulnerability-September-2023vendor-advisory
- https://www.theregister.com/2023/10/02/ws_ftp_update/
- https://www.rapid7.com/blog/post/2023/09/29/etr-critical-vulnerabilities-in-ws_ftp-server/
- https://attackerkb.com/topics/bn32f9sNax/cve-2023-40044
- https://censys.com/cve-2023-40044/
- https://www.assetnote.io/resources/research/rce-in-progress-ws-ftp-ad-hoc-via-iis-http-modules-cve-2023-40044
- http://packetstormsecurity.com/files/174917/Progress-Software-WS_FTP-Unauthenticated-Remote-Code-Execution.html
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-40044government-resource
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