Mattermost versions 10.1.x <= 10.1.2, 10.0.x <= 10.0.2, 9.11.x <= 9.11.4, and 9.5.x <= 9.5.12 fail to prevent concurrently checking and updating the failed login attempts. which allows an attacker to bypass of "Max failed attempts" restriction and send a big number of login attempts before being blocked via simultaneously sending multiple login requests
{
"versions": [
{
"introduced": "9.5.0"
},
{
"fixed": "9.5.13"
},
{
"introduced": "9.11.0"
},
{
"fixed": "9.11.5"
},
{
"introduced": "10.0.0"
},
{
"fixed": "10.0.3"
},
{
"introduced": "10.1.0"
},
{
"fixed": "10.1.3"
}
]
}