Vulnerability in Accellion Kiteworks Managed File Transfer
CVE-2025-53899
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.009 (60.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Accellion Kiteworks Managed File Transfer
- Kiteworks Security-Advisories — versions < 9.1.0
Weakness classification (CWE)
References
- github.com/kiteworks/security-advisories/security/advisories/GHSA-5gx5-vcpp-8cr5 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2025-53899?
- CVE-2025-53899 is a high-severity vulnerability in Accellion Kiteworks Managed File Transfer, classified under CWE-941. CVSS score: 7.2/10. Published 2025-11-29.
- How severe is CVE-2025-53899?
- High severity. CVSS v3 base score is 7.2 out of 10.