CVE-2026-5226: Optimole – Optimize Images In Real Time

Medium severity, CVSS 6.1. EPSS: 0.4% chance of exploitation in the next 30 days.

The Optimole – Optimize Images in Real Time plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via URL paths in versions up to, and including, 4.2.3 This is due to insufficient output escaping on user-supplied URL paths in the get_current_url() function, which are inserted into JavaScript code via str_replace() without proper JavaScript context escaping in the replace_content() function. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

Affected products

• Optimole Optimole – Optimize Images In Real Time: up to and including 4.2.3

Published 2026-04-11. Last modified 2026-06-17.