This vulnerability in the Showpass WordPress Extension (<= 4.0.3) allows stored cross-site scripting due to improper input neutralization during web page generation. An attacker with low privileges can inject malicious scripts that execute when other users view the affected pages, potentially leading to partial compromise of confidentiality, integrity, and availability. The CVSS 3.1 vector indicates network attack vector, low attack complexity, low privileges required, user interaction needed, and scope change. No patch or official fix information is provided in the available data.

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 disrupt availability. The impact is rated medium with partial loss of confidentiality, integrity, and availability. No known exploits in the wild have been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, users should consider restricting privileges and limiting user input where possible. Monitor official marcshowpass channels for updates and apply patches promptly once released.