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Vulnerabilities

Vulnerability · CVE-2026-5229

The Form Notify plugin for WordPress is vulnerable to Authentication Bypass in versions up to and including 1.1.10.

Published May 15, 2026 · catalog updated Jun 17, 2026 · The Form Notify plugin

Check if you run it

No confirmed exploitation is on record for CVE-2026-5229. EPSS is 1.10%. Act only if a listed version of The Form Notify plugin is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (The Form Notify plugin).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Critical9.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.10%
Remediation
Version ranges on file
Affected products
stated named in the record

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • stated named in the record<= 1.1.10

How to fix CVE-2026-5229

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-5229. EPSS is 1.10%. Act only if a listed version of The Form Notify plugin is installed.

Which versions are affected?

Compare what you have installed with named in the record <= 1.1.10. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-287: Improper Authentication. EPSS 1.10%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

WordPress security

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. May 15, 2026 · NIST NVD

    Detected

    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 witho

  2. Jun 17, 2026 · NIST NVD

    Updated

    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 witho

Sources

  • CVE.orgVulnerability recordCVE-2026-5229

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-5229

    30-day exploitation probability 1.1%

    first.org
  • NIST NVDVulnerability recordCVE-2026-5229

    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 prov

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.