CVE-2021-24840 : What You Need to Know

Squaretype Modern Blog version less than 3.0.4 is vulnerable to an attack that allows unauthenticated users to access private and scheduled posts. The security flaw enables manipulation of query_vars in one of its REST endpoints without validation.

Understanding CVE-2021-24840

This CVE relates to a vulnerability in the Squaretype WordPress theme that exposes private and scheduled posts to unauthorized users.

What is CVE-2021-24840?

The Squaretype WordPress theme before version 3.0.4 allows unauthenticated users to manipulate query_vars and access private or scheduled posts through a crafted request without proper validation.

The Impact of CVE-2021-24840

This vulnerability could lead to unauthorized disclosure of sensitive information, including private and scheduled posts, to users who should not have access.

Technical Details of CVE-2021-24840

The following technical details provide insights into the vulnerability:

Vulnerability Description

The issue resides in the Squaretype WordPress theme before 3.0.4, where unauthenticated users can exploit query_vars to retrieve private and scheduled posts via a specific REST endpoint.

Affected Systems and Versions

Squaretype Modern Blog version less than 3.0.4 is affected by this vulnerability.

Exploitation Mechanism

Attackers can manipulate query_vars via a crafted request to access private and scheduled posts without proper validation.

Mitigation and Prevention

To address CVE-2021-24840, consider the following mitigation strategies:

Immediate Steps to Take

Update Squaretype Modern Blog to version 3.0.4 or later to patch the vulnerability.
Implement access controls to limit exposure of sensitive information.

Long-Term Security Practices

Regularly update themes and plugins to protect against known vulnerabilities.
Perform security audits to identify and address potential weaknesses in WordPress installations.

Patching and Updates

Stay informed about security updates for WordPress themes and apply patches promptly to prevent exploitation of vulnerabilities.