Hello,
Thank you very much for reporting the vulnerability. I have just committed the fix for it to our repository on GitHub:
https://github.com/Cotonti/Cotonti/commit/45eec046391afabb676b62b9201da0cd530360b4
This fix will be included in the upcoming 0.9.14 release which we will do our best to release by July 22.
May the Source be with you!