CVE-2026-5229

CRITICAL

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...

Affects 0 products across 6 vendors.

BCS7.12
CVSS 3.19.8
EPSS0.7%
Percentile50th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, impact contained to the vulnerable component, full confidentiality impact, full integrity impact, full availability impact.
CWE Weakness Definitions
CWE-287: Improper Authentication

Software does not prove or insufficiently proves that the user is who they claim to be.

Related Attack Patterns (CAPEC)
CAPEC-57 Utilizing REST's Trust in the System Resource to Obtain Sensitive Data
via CWE-287
CAPEC-633 Token Impersonation
via CWE-287
CAPEC-650 Upload a Web Shell to a Web Server
via CWE-287
CAPEC-194 Fake the Source of Data
via CWE-287
CAPEC-593 Session Hijacking
via CWE-287
Show all 10

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ SAGE Intelligence — CITED Relevance Research Team

The Form Notify plugin for WordPress is vulnerable to an Authentication Bypass in versions up to and including 1.1.10, allowing attackers to authenticate as any user by manipulating a specific cookie value.

BSID: BS-2026-GLOBAL-154041-C • Model: /workspace/models/qwen2.5-coder-32b-instruct-bf16 • Confidence: HIGH

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Frequently Asked Questions
What is CVE-2026-5229?
The Form Notify plugin for WordPress is vulnerable to an Authentication Bypass in versions up to and including 1.1.10, allowing attackers to authenticate as any user by manipulating a specific cookie value.
What is the CVSS score for CVE-2026-5229?
CVE-2026-5229 has CVSS 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS: 0.7%.
Is CVE-2026-5229 actively exploited?
No confirmed active exploitation of CVE-2026-5229 as of 2026-05-30.
How do I remediate CVE-2026-5229?
Priority: IMMEDIATE.
What systems are affected by CVE-2026-5229?
CVE-2026-5229 affects: Associated, Determine, Form, Plugin, Target, Wordpress.
Vulnerability Details
CVE IDCVE-2026-5229
BSIDBS-2026-GLOBAL-154041-C BreachSpider Global ID
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published2026-05-15
Last Modified2026-05-15
ICS Relevance15%
Weakness (CWE)
SourceNVD
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.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

The vulnerability arises from the plugin's reliance on user-controlled cookie data ('form_notify_line_email') to determine the authenticated WordPress account after a LINE OAuth login, particularly when LINE does not provide an email address.

Exploitation Likelihood: HIGH

Affected Products
VendorProductFixed Version
Associated —
Determine —
Form —
Plugin —
Target —
Wordpress —
Remediation

No patch URL on record. Monitor vendor security advisories directly.

Threat Intelligence
● Threat Intelligence Validated: July 2026 | Threat Age: 71 Days
CISA KEVNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
SAGE Enrichment Record — provenance & audit hash
Model/workspace/models/qwen2.5-coder-32b-instruct-bf16
ConfidenceHIGH
Enriched At2026-05-24
SHA-512 Audit Hash61aa71fe6284101cac04e099904b52759d3075a9dfd4aa5a2392479ab8fe616016671616698f975e673828ab1d03e6119fe516da1259d8caef6f9282198636a7
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