What the vulnerability does
01Description
The clubmember plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 0.2 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
Explanation of Vulnerability in Simple Terms
02Summary
ClubMember versions 0.2 and earlier contain a cross-site scripting (XSS) vulnerability that allows high-privilege users to inject malicious scripts affecting other users or the site. The vulnerability requires high attack complexity and high privileges to exploit. Impact is limited to low-level confidentiality and integrity compromise.
What an attacker can do
03Attacker Capabilities
Inject malicious scripts that execute in other users' browsers or affect site functionality.
Potential impact on your site
04Site Impact
A compromised admin account could inject scripts affecting other users' sessions or data integrity.
Conditions required to exploit
05Prerequisites
Attacker must have high-level administrative or privileged account access to the site.
Key dates
06Disclosure timeline
November 4, 2025
CVE published
April 8, 2026
Record updated
