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.
History

Fri, 15 May 2026 11:45:00 +0000

Type Values Removed Values Added
First Time appeared M615926
M615926 receive Notifications After Form Submitting – Form Notify For Any Forms
Wordpress
Wordpress wordpress
Vendors & Products M615926
M615926 receive Notifications After Form Submitting – Form Notify For Any Forms
Wordpress
Wordpress wordpress

Fri, 15 May 2026 09:00:00 +0000

Type Values Removed Values Added
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.
Title Receive Notifications After Form Submitting – Form Notify for Any Forms <= 1.1.10 - Unauthenticated Authentication Bypass via LINE OAuth Callback
Weaknesses CWE-287
References
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-05-15T07:46:36.949Z

Reserved: 2026-03-31T13:24:44.823Z

Link: CVE-2026-5229

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-15T09:16:16.690

Modified: 2026-05-15T09:16:16.690

Link: CVE-2026-5229

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-15T11:20:51Z