High severity · published Nov 29, 2025
CVE-2025-53899
Kiteworks MFT is vulnerable to an Incorrectly Specified Destination in a Communication Channel
7.2
CVSS
0.9%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 61% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
security-advisories · kiteworks
< 9.1.0 · source: vendor
KM
Kiteworks Managed File Transfer · Accellion
before 9.1.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-53899
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-53899
Patch
https://github.com/kiteworks/security-advisories/security/advisories/GHSA-5gx5-vcpp-8cr5
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