What the vulnerability does
01Description
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.
Explanation of Vulnerability in Simple Terms
02Summary
The Converter for Media plugin for WordPress contains an authorization flaw that allows authenticated users with low privileges to modify data they should not have access to. The vulnerability affects versions up to 6.3.2. An attacker with a basic user account can alter settings or content without proper permission checks. Update to a version newer than 6.3.2 to resolve this issue.
What an attacker can do
03Attacker Capabilities
Modify plugin settings or data without proper authorization as a low-privilege user.
Potential impact on your site
04Site Impact
Unauthorized users can alter plugin configuration or media conversion settings, potentially disrupting site functionality.
Conditions required to exploit
05Prerequisites
Attacker must have a valid WordPress user account with low privileges; no user interaction required.
Key dates
06Disclosure timeline
December 17, 2025
CVE published
April 8, 2026
Record updated