The Lars Wallenborn Show/Hide Shortcode plugin suffers from a stored cross-site scripting vulnerability due to improper input neutralization during web page generation. This allows an attacker with low privileges to inject malicious scripts that execute when other users view the affected content. The vulnerability affects all versions up to 1.0.0. The CVSS 3.1 vector indicates network attack vector, low attack complexity, low privileges required, user interaction required, and impacts confidentiality, integrity, and availability at a low level.

Successful exploitation of this vulnerability could allow an attacker to execute arbitrary scripts in the context of the affected web application, potentially leading to information disclosure, modification of content, or disruption of service. The impact is rated as medium severity with limited confidentiality, integrity, and availability impacts. 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 disabling or limiting use of the Show/Hide Shortcode plugin to trusted users only. Applying strict input validation or sanitization on user inputs related to this plugin may help mitigate risk. Monitor vendor channels for updates and apply patches promptly once available.