An information disclosure vulnerability exists in Rocket.Chat <v5, <v4.8.2 and <v4.7.5 since the getReadReceipts Meteor server method does not properly filter user inputs that are passed to MongoDB queries, allowing $regex queries to enumerate arbitrary Message IDs.
[
{
"product": "Rocket.Chat",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "Fixed in versions 4.7.5, 4.8.2 and 5.0.0"
}
]
}
]