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9.8

CVE-2026-5229: Form Notify plugin for WordPress: Unauthorized Access to Admin Accounts

CVE-2026-5229
Summary

The Form Notify plugin for WordPress versions up to 1.1.10 allows attackers to access any account, including admin accounts, on your site by tricking the plugin into thinking they're a different user. This is a serious security risk that can give unauthorized access to sensitive areas of your site. Update to the latest version of the plugin to fix this issue.

Original title
The Form Notify plugin for WordPress is vulnerable to Authentication Bypass in versions up to and including 1.1.10. This is due to the plugin trusting user-controlled cookie data to determine which...
Original description
The Form Notify plugin for WordPress is vulnerable to Authentication Bypass in versions up to and including 1.1.10. This is due to the plugin trusting user-controlled cookie data to determine which WordPress account to authenticate after a LINE OAuth login. When LINE doesn't provide an email address (which is common), the plugin falls back to reading the 'form_notify_line_email' cookie value without verifying that the LINE account is associated with that email address. This makes it possible for unauthenticated attackers to gain access to any user account on the site, including administrator accounts, by completing a LINE OAuth flow with their own LINE account while injecting a malicious cookie containing the target victim's email address.
nvd CVSS3.1 9.8
Vulnerability type
CWE-287 Improper Authentication
Published: 15 May 2026 · Updated: 30 May 2026 · First seen: 15 May 2026