Accellion FTP server prior to version FTA_9_12_220 uses the Accusoft Prizm Content flash component, which contains multiple parameters (customTabCategoryName, customButton1Image) that are vulnerable to cross-site scripting.
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
5.4% chance of exploitation in the next 30 days; higher than 92% of CVEs (scores of 2026-10-31)