CVE-2024-4838 HIGH

CVE-2024-4838: ConvertPlus <= 3.5.26 - Authenticated (Contributor+) PHP Object Injection

Vendor Brainstorm Force
Product ConvertPlus
Weakness CWE-502 · Unsafe deserialization
Published May 16, 2024
Last update April 8, 2026

CVSS base score

7.5/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

The ConvertPlus plugin for WordPress is vulnerable to PHP Object Injection in all versions up to, and including, 3.5.26 via deserialization of untrusted input from the 'settings_encoded' attribute of the 'smile_modal' shortcode. This makes it possible for authenticated attackers, with contributor-level access and above, to inject a PHP Object. No POP chain is present in the vulnerable plugin. If a POP chain is present via an additional plugin or theme installed on the target system, it could allow the attacker to delete arbitrary files, retrieve sensitive data, or execute code.

Key dates

02Disclosure timeline

May 16, 2024 CVE published
April 8, 2026 Record updated