The Flatsome theme by UX-themes contains a reflected cross-site scripting vulnerability due to improper input neutralization during web page generation. This allows attackers to inject malicious scripts that can execute in the context of a victim's browser. The vulnerability affects Flatsome versions up to and including 3.20.5. The CVSS 3.1 base score is 7.1, indicating high severity with network attack vector, low attack complexity, no privileges required, user interaction required, and impacts on confidentiality, integrity, and availability. No vendor advisory or patch information is currently available.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of the affected web application, potentially leading to data disclosure, modification, or disruption of service. The reflected XSS nature requires user interaction to trigger the malicious payload. The vulnerability impacts confidentiality, integrity, and availability as indicated by the CVSS vector.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider applying web application firewall (WAF) rules to detect and block reflected XSS attempts and avoid exposing vulnerable versions publicly where possible.