A user with Editor permissions can place a malicious script in the attribution field of a Geomap panel's XYZ tile layer via a template variable. The script then executes in the browser of any user who views the affected dashboard (stored cross-site scripting).
2.6.0+dfsg-1Exploitability
AV:NAC:LPR:LUI:RScope
S:CImpact
C:LI:LA:NCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N