What the vulnerability does
01Description
The Newsletters plugin for WordPress is vulnerable to Local File Inclusion in all versions up to, and including, 4.9.9.9 via the 'file' parameter. This makes it possible for authenticated attackers, with Administrator-level access and above, to include and execute arbitrary files on the server, allowing the execution of any PHP code in those files. This can be used to bypass access controls, obtain sensitive data, or achieve code execution in cases where images and other “safe” file types can be uploaded and included.
Explanation of Vulnerability in Simple Terms
02Summary
The Newsletters product contains a path traversal vulnerability that allows authenticated administrators to read, modify, or delete arbitrary files on the server. An attacker with high-level privileges can exploit this by crafting malicious file paths. The vulnerability affects all versions up to 4.9.9.9 and requires administrative access to exploit.
What an attacker can do
03Attacker Capabilities
Read, modify, or delete arbitrary files on the server.
Potential impact on your site
04Site Impact
An admin account compromise could expose sensitive files, alter site configuration, or cause data loss.
Conditions required to exploit
05Prerequisites
Attacker must have administrator-level access to the Newsletters product.
Key dates
06Disclosure timeline
May 31, 2025
CVE published
April 8, 2026
Record updated
