Cells 2.0.7 is a hotfix security release. Some vulnerabilities were discovered by security researchers (who will soon publish the corresponding CVE's). As such, upgrading is urgently required.
As we are in the meantime working on an important update (more about that soon), we've also cherry-picked a couple of fixes from the master :
Upgrade is straight-forward using in-app update tool.
These are the independant researches that raised the issues to us. Thanks to them!