CVE-2023-5098 : Security Advisory and Response

This article provides detailed information about CVE-2023-5098, focusing on the vulnerability found in the Campaign Monitor Forms by Optin Cat WordPress plugin.

Understanding CVE-2023-5098

CVE-2023-5098 highlights a security flaw in the Campaign Monitor Forms by Optin Cat WordPress plugin that allows users with low privileges to overwrite options on a website, potentially leading to various outcomes, including Denial of Service (DoS) attacks.

What is CVE-2023-5098?

The CVE-2023-5098 vulnerability pertains to the Campaign Monitor Forms by Optin Cat WordPress plugin version prior to 2.5.6. It arises due to the plugin's failure to restrict users with limited privileges, such as subscribers, from altering site options using the string "true."

The Impact of CVE-2023-5098

The impact of CVE-2023-5098 is significant as it can enable unauthorized users to modify critical site settings, potentially causing disruptions in the website's functionality and leading to a DoS attack. This vulnerability poses a risk to the security and stability of websites using the affected plugin version.

Technical Details of CVE-2023-5098

The following technical aspects provide a deeper insight into the CVE-2023-5098 vulnerability:

Vulnerability Description

The vulnerability in Campaign Monitor Forms by Optin Cat plugin allows users with low privileges to overwrite site options, potentially resulting in DoS attacks and other adverse consequences.

Affected Systems and Versions

The affected product is Campaign Monitor Forms by Optin Cat plugin with versions less than 2.5.6. Websites using this specific version of the plugin are at risk of exploitation due to this vulnerability.

Exploitation Mechanism

By exploiting CVE-2023-5098, malicious actors can input the string "true" in the site options, leveraging the lack of access control to disrupt website functionality and potentially launch a DoS attack.

Mitigation and Prevention

Protecting your website from CVE-2023-5098 involves taking immediate action to mitigate the risk and prevent potential exploitation:

Immediate Steps to Take

Update the Campaign Monitor Forms by Optin Cat plugin to version 2.5.6 or later to patch the vulnerability.
Monitor website activity for any unusual changes that may indicate an attempted exploit of the CVE-2023-5098 vulnerability.

Long-Term Security Practices

Regularly update plugins and software to ensure that your website is safeguarded against known vulnerabilities.
Implement strong access controls to restrict user permissions and prevent unauthorized modifications to site options.

Patching and Updates

Stay informed about security updates released by plugin developers and apply patches promptly to address vulnerabilities like CVE-2023-5098 and enhance the overall security posture of your website.