CVE-2023-42659

Progress Ws FTP Server vulnerability

9.1 CRITICALEPSS 0.90%

Published7 Nov 2023

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 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredLow

User interactionNone

ScopeChanged

ConfidentialityHigh

IntegrityLow

AvailabilityLow

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

Affected products

Progress Ws FTP Server≥ 8.8.0 < 8.8.4 · < 8.7.6

Remediation

Fixed in

Progress Ws FTP Server≥ 8.8.4

Frequently asked

Is CVE-2023-42659 being actively exploited?

CVE-2023-42659 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.90%.

How severe is CVE-2023-42659?

CVE-2023-42659 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.90% probability of exploitation.

Which products are affected by CVE-2023-42659?

Affected products include Progress Ws FTP Server.

How do I fix CVE-2023-42659?

Upgrade affected software to a fixed version, for example Progress Ws FTP Server 8.8.4 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2023-42659 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation works Book a demo

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.