Mattermost Improper Validation of Specified Type of Input vulnerability

Mattermost versions 10.1.x = 10.1.2, 10.0.x = 10.0.2, 9.11.x = 9.11.4, 9.5.x = 9.5.12 fail to properly validate the type of callProps which allows a user to cause a client side webapp and mobile DoS to users of particular channels, by sending a specially crafted post...