Versions of the package jquery-validation before 1.20.0 are vulnerable to Cross-site Scripting (XSS) in the showLabel() function, which may take input from a user-controlled placeholder value. This value will populate a message via $.validator.messages in a user localizable dictionary.
Exploitability
AV:NAC:LAT:NPR:NUI:PVulnerable System
VC:NVI:LVA:NSubsequent System
SC:LSI:LSA:N5.3/CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:N/SC:L/SI:L/SA:NInjection