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.
CVE-2026-5229 is a critical severity with CVSS 9.8 Vulnerability issue affecting the Plugin Receive Notifications After Form Submitting – Form Notify for Any Forms. It affects Versions up to 1.1.10 and is fixed in 1.1.11.
Use the related hub and response guides to connect this CVE-2026-5229 report with patch validation, scanner checks, and site hardening work.
Open the grouped hub for related CVEs, affected ranges, severity mix, and patch coverage.
Check access, XML-RPC exposure, backup readiness, and monitoring after patching.
Use containment, evidence capture, remediation, and validation steps when exploit risk is high.
CVE-2026-5229 is tracked for the Plugin Receive Notifications After Form Submitting – Form Notify for Any Forms as critical severity with CVSS 9.8. The affected range is Versions up to 1.1.10. Update Receive Notifications After Form Submitting – Form Notify for Any Forms to 1.1.11 or newer where that version is compatible with the site.
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This report has a CVE identifier, which makes it suitable for focused search and vulnerability triage workflows.
Affected version data gives operators a concrete comparison point against installed WordPress software.
A fixed version is present, so the page can answer update and remediation intent directly.
External references are available for source validation, advisory review, and incident notes.
Use these checks when converting this record into a patch ticket, incident note, or risk acceptance decision.
Inventory the installed Plugin package and compare its version with Versions up to 1.1.10.
Confirm Receive Notifications After Form Submitting – Form Notify for Any Forms is updated to 1.1.11 or newer.
Review references and CVSS vector details for exploitability, authentication requirements, and exposure path.
After patching, re-run vulnerability monitoring and keep the related plugin or theme hub under review for follow-up CVEs.
| Software Type | Plugin |
|---|---|
| Software Slug |
form-notify
View on wordpress.org
|
| CVE | CVE-2026-5229 |
| Patched Versions |
1.1.11
|
| Affected Versions |
Versions up to 1.1.10
|
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