Moodle exposed the names of hidden groups to users who had permission to create calendar events but not to view hidden groups. This could reveal private or restricted group information.
{
"versions": [
{
"introduced": "4.1.0"
},
{
"fixed": "4.1.21"
},
{
"introduced": "4.4.0"
},
{
"fixed": "4.4.11"
},
{
"introduced": "4.5.0"
},
{
"fixed": "4.5.7"
},
{
"introduced": "5.0.0"
},
{
"fixed": "5.0.3"
}
]
}