Ws Ftp Server
CVE-2023-42659
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2025 - Insecure Design
ASVS 5.0
V5 - File Handling File type validation, storage isolation
MITRE ATT&CK
2 techniques across 2 tactics: Command and Control, Persistence The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 8.8 (HIGH). Attack characteristics: network attack vector, low complexity, low privileges required, no user interaction not required. |
| Exploit ScenarioDerived | A remote attacker could upload malicious files that can be executed on the server by sending crafted requests to the affected application. |
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Alert meAnalysisAI
In WS_FTP Server versions prior to 8.7.6 and 8.8.4, an unrestricted file upload flaw has been identified. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate file types server-side, store uploads outside webroot, use random filenames, scan for malware.
Affects your stack
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Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified as Unrestricted File Upload (CWE-434), which allows attackers to upload malicious files that can be executed on the 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. Affected products include: Progress Ws Ftp Server. Version information: prior to 8.7.6.
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- Exploit and PoC references, threat intelligence from 22 sources
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Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
DescriptionNVD
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.
Threat Intelligence Overview
NVD
CVE.org
EPSS
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
Malicious file upload attacks exploit insufficient validation when web applications accept user-provided files.
Affected Products (CPE)NVD
More in Ws Ftp Server
View allIn WS_FTP Server versions prior to 8.7.4 and 8.8.2, a pre-authenticated attacker could leverage a .NET deserialization v
OS command injection in Progress WS_FTP Server on Windows lets authenticated low-privilege users execute arbitrary opera
Progress WS_FTP Server on Windows exposes sensitive information, including administrative credentials, to unauthenticate
An issue was discovered in SSHServerAPI.dll in Progress ipswitch WS_FTP Server 2018 before 8.6.1. Rated critical severit
In WS_FTP Server versions prior to 8.7.4 and 8.8.2, a directory traversal vulnerability was discovered. Rated critical s
Path traversal in Progress WS_FTP Server on Windows lets a delegated Host Administrator escape the scope they were grant
Privilege escalation in Progress WS_FTP Server on Windows lets an account holding the delegated Host Administrator role
OS command injection in Progress Software WS_FTP Server on Windows (versions prior to 2024.0.7 and prior to 2025.0.4) al
Path traversal in Progress Software WS_FTP Server on Windows allows an authenticated delegated Host Administrator to rea
A Directory Traversal issue was discovered in SSHServerAPI.dll in Progress ipswitch WS_FTP Server 2018 before 8.6.1. Rat
Improper access control in the Web Admin console of Progress WS_FTP Server on Windows, in versions prior to 2024.0.7 on
In WS_FTP Server versions before 8.8.8 (2022.0.8), a Missing Critical Step in Multi-Factor Authentication of the Web Tra
GitHub PoC
Exploit-DB