The Gum Elementor Addon plugin for WordPress suffers from a stored cross-site scripting vulnerability (CWE-79) due to improper neutralization of input during web page generation. Specifically, the Post Meta widget does not adequately sanitize or escape user input, enabling authenticated users with subscriber or higher privileges to inject arbitrary JavaScript code. This code executes in the context of any user viewing the affected page, potentially leading to session hijacking or other script-based attacks. The vulnerability affects all versions up to and including 1.3.2. The CVSS 3.1 base score is 6.4, reflecting network attack vector, low attack complexity, low privileges required, no user interaction, and impacts on confidentiality and integrity with no availability impact. No patch or vendor advisory is currently available, and no known exploits have been reported.

An authenticated attacker with subscriber-level access or higher can inject malicious scripts into pages via the Post Meta widget. These scripts execute in the context of users who view the injected pages, potentially compromising user confidentiality and integrity. The vulnerability does not impact system availability. No known exploitation in the wild has been reported.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict subscriber-level user permissions where possible and monitor for suspicious activity related to the Gum Elementor Addon plugin. Avoid granting unnecessary privileges to users and consider disabling the Post Meta widget if feasible.