CVE-2026-3619 is a stored cross-site scripting vulnerability in the Sheets2Table WordPress plugin, affecting all versions up to 0.4.1. The issue arises from improper neutralization of input in the 'titles' shortcode attribute of the [sheets2table-render-table] shortcode. The attribute value is passed through a function that only trims whitespace but does not sanitize or escape HTML entities before being output inside a <th> tag. This allows authenticated users with Contributor-level permissions or higher to inject arbitrary JavaScript that executes in the context of users viewing the page, potentially leading to session hijacking or other script-based attacks.

An attacker with Contributor-level or higher privileges can inject malicious scripts into pages using the vulnerable shortcode. These scripts execute in the browsers of users who view the injected pages, potentially leading to theft of session tokens, defacement, or other client-side attacks. The vulnerability does not affect availability and requires authentication, but it compromises confidentiality and integrity of user sessions and data within the affected WordPress site.

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 avoid using the 'titles' attribute in the [sheets2table-render-table] shortcode. Monitor for plugin updates from the vendor that address this vulnerability and apply them promptly once released.