Version 0.6.x is maintained, previous are not.

Report security bugs by emailing the lead maintainer in the pom.xml file.

The lead maintainer will acknowledge your email within 48 hours, and will send a more detailed response within 48 hours indicating the next steps in handling your report. After the initial reply to your report, the security team will endeavor to keep you informed of the progress towards a fix and full announcement, and may ask for additional information or guidance.