CVE-2026-27537

The vulnerability allows unauthenticated cross-site scripting (XSS) in Popup by Supsystic versions up to 1.11.2, potentially enabling attackers to inject malicious scripts into web pages viewed by users. This could lead to session hijacking, data theft, or defacement of the affected site. Organizations using this plugin should prioritize patching or mitigating this issue to protect their users and maintain site integrity.