uSync ships one release line per Umbraco major. Fixes go to the current line, and to the previous one where the issue is serious and the fix is practical. Older lines are kept as {major}/dev branches for reference but are not actively maintained.

Please do not open a public issue for a security problem.

Email info@jumoo.co.uk with a description of the issue, the version affected, and steps to reproduce it. We'll acknowledge within a few working days and keep you updated as we work on it.

uSync reads and writes content from Umbraco's database onto disk, and re-imports disk files (including on server start), so if the issue involves file paths, archive extraction, or XML/JSON parsing of a file that isn't fully trusted, say so - those get sequenced first.