An issue has been discovered in GitLab CE/EE affecting all previous versions. If the victim is an admin, it was possible to issue a CSRF in System hooks through the API.
{
"versions": [
{
"introduced": "0"
},
{
"last_affected": "13.10.0"
},
{
"introduced": "0"
},
{
"last_affected": "13.10.0"
}
]
}