CVE-2025-4279: Muromuro External Image Replace

High severity, CVSS 8.8. EPSS: 0.8% chance of exploitation in the next 30 days.

The External image replace plugin for WordPress is vulnerable to arbitrary file uploads due to missing file type validation in the 'external_image_replace_get_posts::replace_post' function in all versions up to, and including, 1.0.8. This makes it possible for authenticated attackers, with contributor-level and above permissions, to upload arbitrary files on the affected site's server which may make remote code execution possible.

Affected products

• Muromuro External Image Replace: up to and including 1.0.8

Published 2025-05-05. Last modified 2026-06-17.