CVE-2023-40044

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.

CVSS v3.1

8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1

10.0 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS

90.15% chance of exploitation in the next 30 days, 100th percentile

CISA KEV

added 2023-10-05, used in ransomware campaigns

Nuclei

critical · CWE-502

Published

2023-09-27

Updated

2025-10-21

Proof-of-concept exploits (4)

• http://packetstormsecurity.com/files/174917/Progress-Software-WS_FTP-Unauthenticated-Remo…
• https://www.assetnote.io/resources/research/rce-in-progress-ws-ftp-ad-hoc-via-iis-http-mo…
• kenbuckler/WS_FTP-CVE-2023-400441★ · 2023-10-02
• getdrive/PoC

Nuclei templates (1)

• projectdiscovery/nuclei-templates/blob/main/http/cves/2023/CVE-2023-40044.yaml

Metasploit modules (1)

• rapid7/metasploit-framework/blob/master/modules/exploits/windows/http/ws_ftp_rce_cve_2023…

References

• CVE Record
• NVD entry

Related

• CVE-2023-34362
• CVE-2023-1671
• CVE-2023-22515
• CVE-2023-23333
• CVE-2023-26469
• CVE-2023-27350