← Vulnerability feed

Vulnerability record · CVE-2025-53899 · published 29 November 2025

CVE-2025-53899: Accellion kiteworks managed file transfer vulnerability

Accellion · Kiteworks Managed File Transfer

Kiteworks MFT orchestrates end-to-end file transfer workflows. Prior to version 9.1.0, the back-end of Kiteworks MFT is vulnerable to an incorrectly specified destination in a communication channel which allows an attacker with administrative privileges on the system under certain circumstances to intercept upstream communication which could lead to an escalation of privileges. This issue has been patched in version 9.1.0.

7.2 CVSS 3.1 High EPSS 0.94% · top 40.7% CWE-941 · CWE-941
7.2CVSS 3.1 base score
0.94%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

Kiteworks MFT orchestrates end-to-end file transfer workflows. Prior to version 9.1.0, the back-end of Kiteworks MFT is vulnerable to an incorrectly specified destination in a communication channel which allows an attacker with administrative privileges on the system under certain circumstances to intercept upstream communication which could lead to an escalation of privileges. This issue has been patched in version 9.1.0.

CVSS:3.1/AV:N/AC:L/PR:H/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://github.com/kiteworks/security-advisories/security/advisories/GHSA-5gx5-vcpp-8cr5 PatchThird Party Advisory

Track CVE-2025-53899 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

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

8.8CVE-2025-53900Accellion kiteworks managed file transfer vulnerabilityKiteworks MFT orchestrates end-to-end file transfer workflows. Prior to version 9.1.0, an unfavourable definition of roles and permissions in Kitewor…EPSS 1.1%8.1CVE-2025-53896Accellion kiteworks managed file transfer insufficient session expiration vulnerabilityKiteworks MFT orchestrates end-to-end file transfer workflows. Prior to version 9.1.0, a bug in Kiteworks MFT could cause under certain circumstances…EPSS 0.19%6.8CVE-2025-53897Accellion kiteworks managed file transfer cross-site request forgery vulnerabilityKiteworks MFT orchestrates end-to-end file transfer workflows. Prior to version 9.1.0, this vulnerability could allow an external attacker to gain ac…EPSS 0.20%

Source: NIST National Vulnerability Database (record CVE-2025-53899), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.