SurrealDB before 1.5.4 fails to properly validate authentication when a scope user switches databases using the USE clause or use method. Attackers with an authenticated session can impersonate an unrelated user in a different database if a user record with an identical identifier exists, allowing unauthorized actions if permissions rely solely on the $auth parameter.
Exploitability
AV:NAC:LAT:NPR:LUI:NVulnerable System
VC:LVI:LVA:LSubsequent System
SC:NSI:NSA:N5.3/CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:NAuthentication