CVE-2025-13750: Mateuszgbiorczyk Converter For Media – Optimize Images | Convert WebP & Avif

Medium severity, CVSS 4.3. EPSS: 0.3% chance of exploitation in the next 30 days.

The Converter for Media – Optimize images | Convert WebP & AVIF plugin for WordPress is vulnerable to unauthorized modification of data due to a missing capability check on the `/webp-converter/v1/regenerate-attachment` REST endpoint in all versions up to, and including, 6.3.2. This makes it possible for authenticated attackers, with Subscriber-level access and above, to delete optimized WebP/AVIF variants for arbitrary attachments.

Affected products

• Mateuszgbiorczyk Converter For Media – Optimize Images | Convert WebP & Avif: up to and including 6.3.2

Published 2025-12-17. Last modified 2026-09-28.