Kiuwan and its team makes their best effort to keep up to date with the latest CWE version. We map every applicable vulnerability found to the correspondent CWE. The mapping is clearly accessible from the list of vulnerabilities found with a direct link to the CWE mapped with the vulnerability.
With every Kiuwan Code Security major release, the mappings are reviewed and modified accordingly to keep up to date with CWE versions. If there are any changes regarding CWE mappings all users are promptly informed with an in-app message.
See al the information about CWE in the CWE mitre.org site
See also these other Kiuwan's documentation pages to help you understand CWE mapping:
CWE in Models Management > Rules Management
CWE in Vulnerabilities reports