The HT Mega Addons for Elementor plugin suffers from a stored XSS vulnerability due to improper neutralization of input in the 'block_css' and 'inner_css' parameters. Authenticated attackers with Contributor or higher privileges can inject arbitrary JavaScript that executes in the context of users visiting the compromised pages. This vulnerability is present in all plugin versions up to 2.7.6. The CVSS 3.1 vector indicates network attack vector, low attack complexity, low privileges required, no user interaction, and impacts confidentiality and integrity with no availability impact.

Successful exploitation allows an authenticated user with Contributor-level access or above to inject persistent malicious scripts into pages. These scripts execute in the browsers of users who visit the infected pages, potentially leading to data theft, session hijacking, or other client-side attacks. The impact is limited to confidentiality and integrity, with no direct 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 released, restrict Contributor-level access to trusted users only and consider disabling or limiting use of the affected parameters if possible. Monitor for plugin updates from devitemsllc and apply them promptly once available.