Mattermost fails to perform correct authorization checks when creating a playbook action, allowing users without access to the playbook to create playbook actions. If the playbook action created is to post a message in a channel based on specific keywords in a post, some playbook information, like the name, can be leaked.
{
"versions": [
{
"introduced": "0"
},
{
"last_affected": "8.1.5"
},
{
"introduced": "9.2.0"
},
{
"last_affected": "9.2.1"
}
]
}