Newsletter – Send awesome emails from WordPress <= 9.1.0 - Cross-Site Request Forgery to Newsletter Unsubscription

Cross-Site Request Forgery (CSRF)
CVE CVE-2026-1051
CVSS Medium (4.3)
Publicly Published January 19, 2026
Last Updated January 20, 2026
Researcher Sergej Ljubojevic, Boris Bogosavac
Description

The Newsletter – Send awesome emails from WordPress plugin for WordPress is vulnerable to Cross-Site Request Forgery in all versions up to, and including, 9.1.0. This is due to missing or incorrect nonce validation on the hook_newsletter_action() function. This makes it possible for unauthenticated attackers to unsubscribe newsletter subscribers via a forged request granted they can trick a logged-in user into performing an action such as clicking on a link.

References

1 affected software package

Software Type Plugin
Software Slug newsletter (view on wordpress.org)
Patched? Yes
Affected Version
  • <= 9.1.0
Patched Version
  • 9.1.1
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