Privilege Escalation via Missing Authorization in WS_FTP Manager

published 2026-10-29 10 d ago modified 2026-10-30 9 d ago also EUVD-2026-113020

cvss: 9.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 51%
public exploits: 0; none known

Missing authorization in the administrative interface of Progress Software WS_FTP Server versions prior to 2024.0.7 and 2025.0.4 on Windows could allow a delegated Host Administrator to exceed their authorized scope, potentially enabling arbitrary command execution with elevated privileges and complete compromise of the underlying server.

Patch / fix

fixed in 1

Progress Software WS_FTP Server 2024.0.7, 2025.0.4

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 10 d ago (2026-10-30)

Exploit prediction

0.66% chance of exploitation in the next 30 days, higher than 51% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.1	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Affected products

Progress Software WS_FTP Server

Classification

Weakness

CWE-915 Improperly Controlled Modification of Dynamically-Determined Object Attributes
CWE-862 Missing Authorization

References

progress.lightning.force.com /lightning/r/Knowledge__kav/ka7Pb000001vl86IAA/view
vendor-advisory

Sources

CVE List CVE-2026-90863
NVD CVE-2026-90863

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary