The vulnerability CVE-2026-28083 in UX-themes Flatsome is a stored cross-site scripting (XSS) issue caused by improper input neutralization during web page generation. It affects Flatsome versions up to 3.20.1. The vulnerability requires low privileges and user interaction to exploit and can result in partial confidentiality, integrity, and availability impacts. No patch or vendor advisory details are currently available to confirm remediation status.

Successful exploitation could allow an attacker to execute arbitrary scripts in the context of the affected web application, potentially leading to partial compromise of confidentiality, integrity, and availability. The attack requires user interaction and low privileges, limiting the ease of exploitation. There are no known active exploits reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, consider restricting user input where possible and applying web application firewall (WAF) rules to detect and block XSS payloads. Monitor vendor channels for updates.