CVE-2025-13750 MEDIUM

CVE-2025-13750: Converter for Media <= 6.3.2 - Missing Authorization to Authenticated (Subscriber+) Optimized Image Deletion via regenerate-attachment REST Endpoint

Vendor Mateuszgbiorczyk
Product Converter for Media – Optimize images | Convert WebP & AVIF
Weakness CWE-862 · Missing authorization
Published December 17, 2025
Last update April 8, 2026

CVSS base score

4.3/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

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