CVE-2021-25121 Explained : Impact and Mitigation

The Rating by BestWebSoft WordPress plugin before version 1.6 is affected by a vulnerability that allows a Denial of Service attack due to lack of validation on submitted ratings.

Understanding CVE-2021-25121

This CVE identifies a security issue in the Rating by BestWebSoft WordPress plugin, impacting versions below 1.6.

What is CVE-2021-25121?

The vulnerability in the plugin allows users to submit long integers as ratings without proper validation. This can lead to a Denial of Service on the affected post or page.

The Impact of CVE-2021-25121

The lack of input validation in the Rating by BestWebSoft plugin can be exploited by malicious users to disrupt the availability of the post or page by submitting malicious ratings.

Technical Details of CVE-2021-25121

The following technical details outline the specifics of the CVE.

Vulnerability Description

The vulnerability, identified as CWE-191 Integer Underflow, allows attackers to cause a Denial of Service through submission of long integers as ratings.

Affected Systems and Versions

Product: Rating by BestWebSoft
Vendor: Unknown
Versions Affected: < 1.6

Exploitation Mechanism

Malicious users can exploit this vulnerability by submitting lengthy integer values as ratings, triggering a Denial of Service condition on the targeted post or page.

Mitigation and Prevention

To address CVE-2021-25121, it is crucial to take immediate action and implement long-term security practices.

Immediate Steps to Take

Update the Rating by BestWebSoft plugin to version 1.6 or higher to mitigate the vulnerability.
Monitor for any suspicious activity related to ratings on posts and pages.

Long-Term Security Practices

Regularly check for plugin updates and apply them promptly.
Educate users on safe practices for submitting ratings and interacting with WordPress plugins.

Patching and Updates

Stay informed about security advisories related to the Rating by BestWebSoft plugin and apply patches as soon as they are released.