Unauthorized File Disclosure via Path Traversal in Thin Client Web Transfer in Progress WS_FTP Server

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-115341
StatePUBLISHED
AssignerProgressSoftware
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-09 17:17:11 UTC
Updated2026-11-09 18:17:21 UTC
DescriptionImproper access restrictions in the Thin Client Web Transfer component of Progress Software WS_FTP Server versions prior to 2025.0.5 on Windows could allow an authenticated FTP user to access files outside their intended scope.

Risk And Classification

Primary CVSS: v3.1 7.7 HIGH from [email protected]

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

Problem Types: CWE-22 | CWE-862 | CWE-22 CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | CWE-862 CWE-862: Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary7.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N
3.1CNACVSS7.7HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
None
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Progress Software WS FTP Server affected 2025.0.5 custom Windows

References

ReferenceSourceLinkTags
community.progress.com/s/article/WS-FTP-Server-Service-Pack-November-2026 [email protected] community.progress.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Mateusz Mieczkowski (rexnets) (en)

Additional Advisory Data

Workarounds

CNA: Restrict network access to the Thin Client Web Transfer HTTPS endpoint to trusted hosts, or disable Web Transfer functionality if it is not required. Contact Progress Software Technical Support for guidance on available mitigations.

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