CVE-2026-10091 is a stored cross-site scripting vulnerability (CWE-79) in the Email JavaScript Cloak WordPress plugin by cgarvey. The flaw exists in the handling of the 'email' shortcode, where user-supplied attributes are not properly sanitized or escaped before being output in web pages. This allows authenticated attackers with contributor or higher privileges to inject arbitrary JavaScript code that executes in the context of users viewing the compromised pages. The vulnerability affects all plugin versions up to and including 1.03. No official patch or remediation level has been published as of the data provided.

An attacker with contributor-level or higher access can exploit this vulnerability to inject and store malicious JavaScript code within WordPress pages using the vulnerable shortcode. This code executes in the browsers of users who visit the infected pages, potentially leading to session hijacking, privilege escalation, or other client-side attacks. The CVSS 3.1 base score is 7.2 (High), reflecting network attack vector, low attack complexity, no privileges required beyond contributor, no user interaction, and partial confidentiality and integrity impact without availability impact.

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 removing the Email JavaScript Cloak plugin if possible. Monitor for updates from the vendor or plugin author for an official patch or mitigation instructions.