The vulnerability identified as CVE-2026-102798 in ThemeREX Addons (versions >=0 and <2.47.0) is a stored cross-site scripting issue caused by improper input neutralization during web page generation. This allows an attacker with at least low privileges and requiring user interaction to inject malicious scripts that can impact confidentiality, integrity, and availability. The CVSS 3.1 vector indicates network attack vector, low attack complexity, low privileges required, user interaction required, and scope changed, with low impact on confidentiality and integrity and low impact on availability.

Successful exploitation can lead to execution of arbitrary scripts in the context of the affected web application, potentially allowing attackers to steal sensitive information, manipulate content, or perform actions on behalf of authenticated users. The vulnerability affects confidentiality, integrity, and availability to a limited extent as indicated by the CVSS vector.

No explicit patch or remediation information is provided in the available data. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, users should consider restricting privileges and limiting exposure to untrusted inputs where possible.