An issue was discovered in MediaWiki before 1.35.5, 1.36.x before 1.36.3, and 1.37.x before 1.37.1. By using an action=rollback query, attackers can view private wiki contents.
{
"versions": [
{
"introduced": "0"
},
{
"fixed": "1.35.5"
},
{
"introduced": "1.36.0"
},
{
"fixed": "1.36.3"
},
{
"introduced": "1.37.0"
},
{
"fixed": "1.37.1"
}
]
}