CVE-2021-4422 MEDIUM

CVE-2021-4422: POST SMTP Mailer <= 2.0.20 - Cross-Site Request Forgery Bypass

Vendor Saadiqbal
Product Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App
Weakness CWE-352 · CSRF
Published July 12, 2023
Last update April 8, 2026
View on NVD All CVEs

CVSS base score

4.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality None
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

July 12, 2023 CVE published
April 8, 2026 Record updated