Mattermost versions 10.0.x <= 10.0.0 and 9.11.x <= 9.11.2 fail to properly query ElasticSearch when searching for the channel name in channel switcher which allows an attacker to get private channels names of channels that they are not a member of, when Elasticsearch v8 was enabled.
{
"versions": [
{
"introduced": "9.11.0"
},
{
"fixed": "9.11.3"
},
{
"introduced": "0"
},
{
"last_affected": "10.0.0-NA"
},
{
"introduced": "0"
},
{
"last_affected": "10.0.0-rc1"
},
{
"introduced": "0"
},
{
"last_affected": "10.0.0-rc2"
},
{
"introduced": "0"
},
{
"last_affected": "10.0.0-rc3"
},
{
"introduced": "0"
},
{
"last_affected": "10.0.0-rc4"
}
]
}