This vulnerability in Themeum Qubely (<= 1.8.14) involves improper input sanitization during web page generation, leading to stored cross-site scripting (XSS). An attacker could inject malicious scripts that persist and execute when other users access the affected content. The vulnerability is publicly disclosed but lacks a CVSS score and official remediation information.

Successful exploitation could allow attackers to execute arbitrary scripts in the context of users viewing the affected pages, potentially leading to session hijacking, defacement, or other malicious actions within the scope of the affected site. However, no known exploits in the wild have been reported, and the impact depends on the presence of vulnerable versions in use.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider disabling or removing the vulnerable Qubely plugin versions or applying any recommended temporary mitigations from the vendor. Monitor official Themeum channels for updates.