AvantFAX 3.3.3 has XSS via an arbitrary parameter name to the default URI, as demonstrated by a parameter whose name contains a SCRIPT element and whose value is 1.
Severity
CVSS 3.0
6.1 medium
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
EPSS
4.5% chance of exploitation in the next 30 days; higher than 91% of CVEs (scores of 2026-10-31)