CVE-2024-3494 is a stored cross-site scripting vulnerability in the Mesmerize Companion WordPress plugin, affecting all versions up to 1.6.148. The issue stems from improper neutralization of input in the 'mesmerize_contact_form' shortcode, where user-supplied attributes are not adequately sanitized or escaped. Authenticated attackers with contributor-level privileges or higher can exploit this to inject arbitrary JavaScript code that executes in the context of users viewing the compromised pages. This vulnerability can lead to limited confidentiality and integrity impacts but does not affect availability. The CVSS 3.1 base score is 6.4 (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N).

An attacker with contributor-level or higher access can inject persistent malicious scripts into pages via the vulnerable shortcode. These scripts execute in the browsers of users who visit the infected pages, potentially leading to theft of sensitive information or session hijacking. The impact affects confidentiality and integrity but does not cause denial of service. 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 removing the Mesmerize Companion plugin if feasible. Monitor for plugin updates that address this vulnerability.