CVE-2021-4422mediumCWE-352

CVE-2021-4422: medium-severity vulnerability in saadiqbal Post SMTP – Complete Email…

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

Published · Updated

13Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 4.3epss 0.5%
exploitation probability
0.5%top 56% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Affected products
saadiqbal · Post SMTP – Complete Email Deliverability and SMTP Solution with Email Logs, Alerts, Backup SMTP & Mobile App
Related CVEs — saadiqbal Post SMTP – Complete Email…

In the same product, most dangerous first.

CVE-2023-6875CRITICALPOST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress <= 2.8.7 - Authorization Bypass via type connect-app APIEPSS 90.3%CVE-2025-11833CRITICALPost SMTP – Complete SMTP Solution with Logs, Alerts, Backup SMTP & Mobile App <= 3.6.0 - Missing Authorization to Account Takeover via Unauthenticated Email Log DisclosureEPSS 61.5%CVE-2023-7027HIGHPOST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress <= 2.8.7 - Unauthenticated Stored Cross-Site Scripting via deviceEPSS 0.9%CVE-2023-3082HIGHPost SMTP <= 2.5.7 - Unauthenticated Stored Cross-Site Scripting via EmailEPSS 0.5%CVE-2024-5207HIGHPOST SMTP Mailer – Email log, Delivery Failure Notifications and Best Mail SMTP for WordPress <= 2.9.3 - Authenticated (Administrator+) SQL InjectionEPSS 0.5%CVE-2023-6629MEDIUMPOST SMTP Mailer <= 2.8.6 - Reflected Cross-Site Scripting via msgEPSS 0.4%
References
https://blog.nintechnet.com/25-wordpress-plugins-vulnerable-to-csrf-attacks/https://blog.nintechnet.com/more-wordpress-plugins-and-themes-vulnerable-to-csrf-attacks/https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-1/https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-2/https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-3/https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-4/https://blog.nintechnet.com/multiple-wordpress-plugins-fixed-csrf-vulnerabilities-part-5/https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=2473579%40post-smtp&new=2473579%40post-smtp&sfp_email=&sfph_mail=https://www.wordfence.com/threat-intel/vulnerabilities/id/e018ca7c-06dd-4d40-91d4-4ed188b8aaf2?source=cve