Icinga Web 2 before 2.6.2 allows parameters that break navigation dashlets, as demonstrated by a single '$' character as the Name of a Navigation item.
Exploitability
AV:NAC:LPR:NUI:NScope
S:UImpact
C:NI:HA:N7.5/CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N