begin here : 
https://bitcointalk.org/index.php?topic=5352784.0

 then here: 
 https://bitcointalk.org/index.php?topic=5352784.0

And i you don't want to read all social, you can go here :
https://github.com/spesmilo/electrum/security/advisories/GHSA-9gpc-prj9-89x7

my exp was like this one : 
https://github.com/spesmilo/electrum/issues/8419