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OpenAdvisories
Medium · 4.3 CVE-2021-4422 EUVD-2021-34249GHSA-7qhm-w96c-j5vq

POST SMTP Mailer <= 2.0.20 - Cross-Site Request Forgery Bypass

Published Jul 12, 2023 · Updated Apr 8, 2026 · Assigned by Wordfence

Description

The POST SMTP Mailer plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.0.20. This is due to missing or incorrect nonce validation on the handleCsvExport() function. This makes it possible for unauthenticated attackers to trigger a CSV export via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

Affected products

VendorProductAffectedFixed
saadiqbal Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App ≤ 2.0.20 —

References