The Happy Addons for Elementor plugin suffers from a stored XSS vulnerability due to improper neutralization of input in the 'ha_cmc_text' parameter. This allows authenticated users with Contributor or higher privileges to inject arbitrary JavaScript code into pages, which executes in the context of users who visit those pages. The vulnerability is present in all versions up to 3.15.1. The CVSS 3.1 vector indicates network attack vector, low attack complexity, privileges required at the level of a contributor, no user interaction needed, scope changed, and low impact on confidentiality and integrity, with no impact on availability.

An attacker with Contributor-level access or above can exploit this vulnerability to inject malicious scripts that execute in the browsers of users viewing the compromised pages. This can lead to theft of user credentials, session hijacking, or other malicious actions performed in the context of the affected website. The impact is limited to confidentiality and integrity with no availability impact. There are no known exploits in the wild at this time.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict Contributor-level access to trusted users only and consider disabling or limiting use of the Happy Mouse Cursor feature. Monitor for plugin updates from the vendor and apply them promptly once released.