Mattermost versions 8.1.x before 8.1.10, 9.2.x before 9.2.6, 9.3.x before 9.3.2, and 9.4.x before 9.4.3 fail to limit the number of @-mentions processed per message, allowing an authenticated attacker to crash the client applications of other users via large, crafted messages.
{
"versions": [
{
"introduced": "8.1.0"
},
{
"fixed": "8.1.10"
},
{
"introduced": "9.2.0"
},
{
"fixed": "9.2.6"
},
{
"introduced": "9.3.0"
},
{
"fixed": "9.3.2"
},
{
"introduced": "9.4.0"
},
{
"fixed": "9.4.3"
}
]
}