The vulnerability identified as CVE-2025-26767 affects the Themeum Qubely plugin for WordPress, specifically versions up to 1.8.12. It is a stored cross-site scripting (XSS) issue caused by improper input neutralization during the generation of web pages. An attacker with low privileges and requiring user interaction can exploit this to execute arbitrary scripts in the context of the affected site, potentially impacting confidentiality, integrity, and availability to a limited extent. The CVSS 3.1 vector is AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L, reflecting network attack vector, low attack complexity, low privileges required, user interaction needed, scope changed, and low impact on confidentiality, integrity, and availability.

Successful exploitation could allow an attacker to execute arbitrary scripts in the context of the affected web application, potentially leading to limited disclosure of information, modification of data, or disruption of service. The impact is rated medium based on the CVSS score of 6.5. There are no reports of active exploitation in the wild.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, users should consider limiting privileges of users who can input data into the plugin and apply web application firewall (WAF) rules to detect and block potential XSS payloads. Monitor official Themeum channels for updates regarding patches or mitigations.