CVE-2026-1825 describes a stored cross-site scripting vulnerability in the Show YouTube video plugin for WordPress, affecting all versions up to and including 1.1. The issue arises from improper neutralization of input in the 'syv' shortcode, allowing authenticated users with contributor or higher privileges to inject arbitrary web scripts. These scripts execute in the context of any user accessing the compromised page, leading to potential information disclosure or session hijacking. The CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N) reflects network attack vector, low attack complexity, required privileges, no user interaction, scope change, and limited confidentiality and integrity impact without availability impact.

An attacker with contributor-level or higher access can inject persistent malicious scripts into pages via the vulnerable shortcode. This can lead to execution of arbitrary scripts in the context of users viewing those pages, potentially resulting in data theft, session hijacking, or other client-side attacks. The vulnerability does not affect availability. There are no known exploits in the wild as per current data.

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 Show YouTube video plugin if possible to prevent exploitation.