CVE-2025-12396 is a stored Cross-Site Scripting vulnerability in the alaminopu clubmember WordPress plugin, affecting all versions up to and including 0.2. The issue arises from improper neutralization of input during web page generation, allowing authenticated administrators to inject arbitrary scripts via the plugin's admin settings. This vulnerability manifests in multi-site WordPress environments or installations where unfiltered_html is disabled, enabling script execution when users view the injected pages. The CVSS 3.1 base score is 4.4, reflecting a medium severity with network attack vector, high attack complexity, and requiring high privileges but no user interaction.

An attacker with administrator-level permissions can exploit this vulnerability to inject malicious scripts that execute in the context of other users visiting the affected pages. This can lead to limited confidentiality and integrity impacts, such as session hijacking or unauthorized actions performed on behalf of users. The vulnerability does not impact availability and requires high privileges and a multi-site or restricted HTML environment to be exploitable.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict administrator access to trusted users only and consider disabling or removing the vulnerable plugin in multi-site or unfiltered_html-disabled environments. Monitor for updates from the plugin vendor or WordPress security channels for any forthcoming patches or official mitigations.