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Vulnerability record · CVE-2023-42659 · published 7 November 2023

CVE-2023-42659: Progress ws ftp server unrestricted file upload vulnerability

Progress · Ws Ftp Server

In WS_FTP Server versions prior to 8.7.6 and 8.8.4, an unrestricted file upload flaw has been identified. An authenticated Ad Hoc Transfer user has the ability to craft an API call which allows them to upload a file to a specified location on the underlying operating system hosting the WS_FTP Server application.

8.8 CVSS 3.1 High EPSS 0.90% · top 42.1% CWE-434 · Unrestricted file upload
8.8CVSS 3.1 base score
0.90%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

In WS_FTP Server versions prior to 8.7.6 and 8.8.4, an unrestricted file upload flaw has been identified. An authenticated Ad Hoc Transfer user has the ability to craft an API call which allows them to upload a file to a specified location on the underlying operating system hosting the WS_FTP Server application.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://community.progress.com/s/article/WS-FTP-Server-Service-Pack-November-2023 Vendor Advisory
https://www.progress.com/ws_ftp Product
https://community.progress.com/s/article/WS-FTP-Server-Service-Pack-November-2023 Vendor Advisory
https://www.progress.com/ws_ftp Product

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2023-40044Progress WS_FTP Server .NET deserialization leads to remote code executionWS_FTP Server versions prior to 8.7.4 and 8.8.2 contain a .NET deserialization flaw in the Ad Hoc Transfer module. An attacker can trigger deserializ…KEVEPSS 90%analysed9.6CVE-2023-42657Progress ws ftp server path traversal vulnerabilityIn WS_FTP Server versions prior to 8.7.4 and 8.8.2, a directory traversal vulnerability was discovered.  An attacker could leverage this vulnerabilit…EPSS 17%9.0CVE-2008-0590Progress ws ftp server memory buffer overflow vulnerabilityBuffer overflow in Ipswitch WS_FTP Server with SSH 6.1.0.0 allows remote authenticated users to cause a denial of service (crash) and possibly execut…EPSS 22%8.1CVE-2024-7745Progress ws ftp server authentication bypass by spoofing vulnerabilityIn WS_FTP Server versions before 8.8.8 (2022.0.8), a Missing Critical Step in Multi-Factor Authentication of the Web Transfer Module allows users to …EPSS 0.37%7.5CVE-2004-1884Ipswitch ws ftp pro vulnerabilityIpswitch WS_FTP Server 4.0.2 has a backdoor XXSESS_MGRYY username with a default password, which allows remote attackers to gain access.EPSS 5.8%7.5CVE-2003-0772WS_FTP Server buffer overflows in APPE and STAT commandsWS_FTP 3 and 4 contain multiple buffer overflows reachable through long APPE (append) or STAT (status) command arguments. A remote authenticated user…EPSS 85%analysed7.5CVE-2002-0826Progress ws ftp server vulnerabilityBuffer overflow in WS_FTP FTP Server 3.1.1 allows remote authenticated users to execute arbitrary code via a long SITE CPWD command.EPSS 12%7.5CVE-2001-1021Progress ws ftp server vulnerabilityBuffer overflows in WS_FTP 2.02 allow remote attackers to execute arbitrary code via long arguments to (1) DELE, (2) MDTM, (3) MLST, (4) MKD, (5) RMD…EPSS 42%

Source: NIST National Vulnerability Database (record CVE-2023-42659), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.