A great way to stay up to date with Kura activity is to subscribe to the Kura email list provided by Eclipse. Sign up for the mailing list here.
Issues and bugs related to Kura are tracked with Github Issues. Please enter any issues you find there.
A general discussion forum can be found here.
An overview of the contribution process is here. The key points are:
Vulnerabilities can be reported either via email to the Eclipse Security Team or directly with a project via the Eclipse Foundation's Bugzilla instance. For more information, please visit here.
Use this spreadsheet as a baseline for performing validation on Eclipse Kura.
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