An information disclosure vulnerability exists in Rocket.Chat <v5, <v4.8.2 and <v4.7.5 due to the actionLinkHandler method was found to allow Message ID Enumeration with Regex MongoDB queries.
[
{
"product": "Rocket.chat",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "Fixed in 4.7.5, 4.8.2 and 5.0>"
}
]
}
]