CVE-2021-4422

Name of the Vulnerable Software and Affected Versions: POST SMTP Mailer plugin for WordPress versions up to, and including, 2.0.20

Description: The issue is related to Cross-Site Request Forgery due to missing or incorrect nonce validation on the handleCsvExport() function. This allows unauthenticated attackers to trigger a CSV export via a forged request if they can trick a site administrator into performing an action such as clicking on a link.

Recommendations: For versions up to, and including, 2.0.20, update to a version that includes the fix for the missing or incorrect nonce validation on the handleCsvExport() function. As a temporary workaround, consider restricting access to the handleCsvExport() function to minimize the risk of exploitation.