CVE-2025-53899: Kiteworks MFT orchestrates end-to-end file transfer workflows. Prior to version 9.1.0, the back-end of Kiteworks MFT…
CVE-2025-53899 · Severity: high · CVSS 7.2 · Published 2025-11-29
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.
No. Junglewise Threat Intelligence has no report of CVE-2025-53899 being exploited in the wild.
How severe is CVE-2025-53899?
High severity, with a CVSS score of 7.2, published 29 November 2025.
Which products and versions are affected?
Accellion Kiteworks Managed File Transfer. The advisory does not name versions.
Is there a fix for CVE-2025-53899?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
Am I affected by CVE-2025-53899?
Check whether you run Accellion Kiteworks Managed File Transfer. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.