This vulnerability in the undoIT Theme Switcher Reloaded plugin (versions <= 1.1) allows reflected Cross-site Scripting due to improper input neutralization during web page generation. An attacker can craft a malicious URL or input that, when processed by the plugin, results in script execution in the victim's browser. The CVSS 3.1 base score is 7.1, reflecting network attack vector, low attack complexity, no privileges required, user interaction required, scope changed, and low impact on confidentiality, integrity, and availability.

Successful exploitation of this vulnerability can allow an attacker to execute arbitrary scripts in the context of the affected website's users. This can lead to theft of sensitive information, session hijacking, or other malicious actions impacting confidentiality, integrity, and availability to a limited extent. The reflected nature of the XSS requires user interaction (clicking a crafted link). No known active exploitation has been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider disabling or removing the affected plugin to mitigate risk. Applying web application firewall (WAF) rules that detect and block reflected XSS attempts may provide temporary protection.