A missing check for IPv4 nested inside IPv6 in Nextcloud server < 17.0.1, < 16.0.7, and < 15.0.14 allowed a Server-Side Request Forgery (SSRF) vulnerability when subscribing to a malicious calendar URL.
{
"versions": [
{
"introduced": "0"
},
{
"fixed": "15.0.14"
},
{
"introduced": "16.0.0"
},
{
"fixed": "16.0.7"
},
{
"introduced": "17.0.0"
},
{
"fixed": "17.0.2"
}
]
}