CVE-2021-39321 Explained : Impact and Mitigation

This CVE-2021-39321 article provides details about a vulnerability in the Sassy Social Share WordPress plugin version 3.3.23, allowing PHP Object Injection.

Understanding CVE-2021-39321

CVE-2021-39321 involves a vulnerability in Sassy Social Share version 3.3.23, leading to PHP Object Injection through a specific AJAX action.

What is CVE-2021-39321?

The vulnerability in version 3.3.23 of Sassy Social Share enables PHP Object Injection due to deserialization of unvalidated user inputs, potentially exploited by underprivileged authenticated users.

The Impact of CVE-2021-39321

The impact of this vulnerability is rated as HIGH with a CVSS v3.1 base score of 8.8. It can result in high confidentiality, integrity, and availability impacts.

Technical Details of CVE-2021-39321

This section provides technical insights into the vulnerability in Sassy Social Share version 3.3.23.

Vulnerability Description

The vulnerability arises from PHP Object Injection via a specific AJAX action, allowing attackers to exploit unvalidated user inputs.

Affected Systems and Versions

Product: Sassy Social Share
Vendor: Sassy Social Share
Versions Affected: 3.3.23

Exploitation Mechanism

The vulnerability can be exploited through the wp_ajax_heateor_sss_import_config AJAX action due to deserialization of unvalidated user inputs.

Mitigation and Prevention

Learn how to mitigate the risks associated with CVE-2021-39321.

Immediate Steps to Take

Update the Sassy Social Share plugin to version 3.3.24 to patch the vulnerability.

Long-Term Security Practices

Regularly update all WordPress plugins to the latest versions.
Conduct security audits to identify and address potential vulnerabilities.

Patching and Updates

Ensure that all systems running Sassy Social Share are updated to version 3.3.24 to prevent exploitation of this vulnerability.