CVE-2021-4422

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

Published Jul 12, 2023 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-34249 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.
History
Type Values Removed Values Added
Title POST SMTP Mailer <= 2.0.20 - Cross-Site Request Forgery Bypass
Type Values Removed Values Added
First Time appeared Wpexperts post Smtp
CPEs cpe:2.3:a:wpexperts:post_smtp_mailer:*:*:*:*:*:wordpress:*:* cpe:2.3:a:wpexperts:post_smtp:*:*:*:*:*:wordpress:*:*
Vendors & Products Wpexperts post Smtp Mailer
Wpexperts post Smtp
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Wordfence
Published
Updated
Apr 8, 2026, 5:28 PM
Reserved
Jul 11, 2023, 6:37 PM
Status
Modified
Published
Jul 12, 2023, 7:15 AM
Modified
Jun 17, 2026, 4:19 AM