Vulnerabilities disclosed in Apache Commons Net 

Issue date: 14-06-2023
Affects versions: 15.2, 15.1, 14.7, 13.4

Security Issue ID



Affected Product Version(s)

15.1.4, 15.2.0, 14.7.12, 13.4.21 and previous releases.




CVE-2021-37533 suppress

Prior to Apache Commons Net 3.9.0, Net's FTP client trusts the host from PASV response by default. A malicious server can redirect the Commons Net code to use a different host, but the user has to connect to the malicious server in the first place. This may lead to leakage of information about services running on the private network of the client. The default in version 3.9.0 is now false to ignore such hosts, as cURL does. See


  • Base Score: MEDIUM (6.5)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N


Customers are recommended to upgrade to the latest version. As of the time of writing, 15.2.3, 14.7.14, 13.4.23.