CVE-2025-11378: Shortpixel Image Optimizer – Optimize Images, Convert WebP & Avif

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

The ShortPixel Image Optimizer – Optimize Images, Convert WebP & AVIF plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the 'shortpixel_ajaxRequest' AJAX action in all versions up to, and including, 6.3.4. This makes it possible for authenticated attackers, with Contributor-level access and above, to export and import site options.

Affected products

• Shortpixel Shortpixel Image Optimizer – Optimize Images, Convert WebP & Avif: up to and including 6.3.4

Published 2025-10-18. Last modified 2026-10-09.