CVE-2026-5229 Auth bypass in Receive Notifications After Form Submitting – Form Notify for Any Forms
Unauthenticated attackers can bypass authentication and take over any user account, including administrators, by manipulating LINE OAuth cookies.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-5229?
CVE-2026-5229 is a critical authentication bypass vulnerability in m615926 Receive Notifications After Form Submitting – Form Notify for Any Forms, published on 15 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-287
Which versions are affected by CVE-2026-5229?
How do I fix CVE-2026-5229?
No fix has been published for CVE-2026-5229 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-5229 being exploited?
There is no known exploitation of CVE-2026-5229 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Sources
Also known as GHSA-6cpv-j32f-rqmr.