CVE-2026-5229 | The Form Notify plugin for WordPress is vulnerable to Authen… | CVSS 9.8 CRITICAL

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.

Metadata

CVE ID: CVE-2026-5229
State: PUBLISHED
Assigner: Wordfence
Reserved: 2026-03-31 13:24 UTC
Published: 2026-05-15 07:46 UTC
Last updated: 2026-05-15 13:27 UTC
Primary CWE: CWE-287
CWE-287 Improper Authentication
Vendor / Product: m615926 / Receive Notifications After Form Submitting – Form Notify for Any Forms
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: total

Affected products (1)

Vendor	Product	Platform	Versions
m615926	Receive Notifications After Form Submitting – Form Notify for Any Forms	—	0 ≤ 1.1.10

Weakness (CWE)

CWE	Source	Description
CWE-287	cna	CWE-287 Improper Authentication

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (10)