In JetBrains Kotlin before 1.4.21, a vulnerable Java API was used for temporary file and folder creation. An attacker was able to read data from such files and list directories due to insecure permissions.
{
"versions": [
{
"introduced": "0"
},
{
"fixed": "2.1.0"
},
{
"introduced": "0"
},
{
"last_affected": "1.2.1"
}
]
}