CVE-2018-12895 : What You Need to Know

WordPress up to version 4.9.6 is vulnerable to a critical security issue that allows users with Author privileges to execute arbitrary code by exploiting a directory traversal vulnerability. This can lead to the deletion of important files like wp-config.php, potentially compromising the entire system.

Understanding CVE-2018-12895

In this section, we will delve into the details of the CVE-2018-12895 vulnerability.

What is CVE-2018-12895?

WordPress versions up to 4.9.6 contain a flaw that enables users with Author-level access to run malicious code through a directory traversal in the thumb parameter of the wp-admin/post.php file. This vulnerability arises from inadequate filename validation in the wp-includes/post.php wp_delete_attachment function.

The Impact of CVE-2018-12895

The vulnerability allows attackers with Author, Editor, or Administrator roles to delete critical files like wp-config.php, potentially leading to a complete compromise of the WordPress installation. The attack involves deleting wp-config.php and initiating a new installation process to escalate privileges.

Technical Details of CVE-2018-12895

Let's explore the technical aspects of CVE-2018-12895.

Vulnerability Description

The vulnerability in WordPress up to version 4.9.6 permits Author users to execute arbitrary code by exploiting a directory traversal issue in the thumb parameter of wp-admin/post.php.

Affected Systems and Versions

Product: WordPress
Vendor: N/A
Versions: Up to 4.9.6

Exploitation Mechanism

The vulnerability is exploited by manipulating the thumb parameter in wp-admin/post.php, which triggers the PHP unlink function, potentially leading to the deletion of wp-config.php.

Mitigation and Prevention

Learn how to protect your system from CVE-2018-12895.

Immediate Steps to Take

Update WordPress to the latest version to patch the vulnerability.
Restrict user privileges to minimize the impact of potential attacks.

Long-Term Security Practices

Regularly monitor and audit file changes and system logs.
Educate users on best security practices to prevent unauthorized access.

Patching and Updates

Apply security patches and updates promptly to ensure the protection of your WordPress installation.