Movim prior to version 0.22 is affected by a Cross-Site WebSocket Hijacking vulnerability. This was the result of a missing header validation.
Exploitability
AV:NAC:HPR:NUI:RScope
S:CImpact
C:HI:HA:N8/CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:NOther