The Email Reminders WordPress plugin (wpdevelop) suffers from a stored cross-site scripting vulnerability (CWE-79) via the 'id' parameter in versions up to 2.0.4. Authenticated attackers with Contributor-level privileges or higher can inject malicious scripts that execute in the context of users visiting the injected pages. This occurs due to improper input neutralization during web page generation, specifically insufficient sanitization and escaping of user-supplied input. The vulnerability is publicly documented as CVE-2024-11945 with a CVSS 3.1 base score of 6.4, indicating a medium severity risk. No patch or vendor advisory is currently available, and no known exploits have been reported in the wild.

Successful exploitation allows an authenticated user with Contributor or higher privileges to inject and execute arbitrary JavaScript in the context of other users viewing the affected pages. This can lead to limited confidentiality and integrity impacts, such as session hijacking or unauthorized actions performed on behalf of other users. Availability is not affected. The vulnerability requires authentication and low attack complexity.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, restrict Contributor-level access to trusted users only and monitor plugin updates closely. Consider disabling or removing the Email Reminders plugin if possible to reduce exposure.