We focus development efforts on the latest release of the library to reduce maintenance overhead and increase the pace of improvement. We'll prioritize releasing a new version of the library whenever any security concerns are addressed but we don't plan on back-porting fixes to earlier releases.
We recommend staying up to date with the latest version of this library as that will provide the most secure and best experience.
Please create a Bug Report documenting the security vulnerability clearly along with examples of how to encounter it.