FKIE_CVE-2026-5229

Vulnerability from fkie_nvd - Published: 2026-05-15 09:16 - Updated: 2026-05-15 14:09
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
security@wordfence.comhttps://github.com/oberonlai/form-notify/commit/5eab0ea
security@wordfence.comhttps://github.com/oberonlai/form-notify/commit/9780764
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/form-notify/tags/1.1.08/src/APIs/Line/Login/Route.php#L116-L118
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/form-notify/tags/1.1.08/src/APIs/Line/Login/User.php#L53
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/form-notify/tags/1.1.08/src/APIs/Line/Login/User.php#L72
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/form-notify/trunk/src/APIs/Line/Login/Route.php#L116-L118
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/form-notify/trunk/src/APIs/Line/Login/User.php#L53
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/form-notify/trunk/src/APIs/Line/Login/User.php#L72
security@wordfence.comhttps://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3517908%40form-notify&new=3517908%40form-notify&sfp_email=&sfph_mail=
security@wordfence.comhttps://www.wordfence.com/threat-intel/vulnerabilities/id/2f0a7d6f-9b95-4052-bab3-85aca01f6ab7?source=cve
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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\u0027t provide an email address (which is common), the plugin falls back to reading the \u0027form_notify_line_email\u0027 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\u0027s email address."
    }
  ],
  "id": "CVE-2026-5229",
  "lastModified": "2026-05-15T14:09:15.910",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "security@wordfence.com",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-05-15T09:16:16.690",
  "references": [
    {
      "source": "security@wordfence.com",
      "url": "https://github.com/oberonlai/form-notify/commit/5eab0ea"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://github.com/oberonlai/form-notify/commit/9780764"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/form-notify/tags/1.1.08/src/APIs/Line/Login/Route.php#L116-L118"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/form-notify/tags/1.1.08/src/APIs/Line/Login/User.php#L53"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/form-notify/tags/1.1.08/src/APIs/Line/Login/User.php#L72"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/form-notify/trunk/src/APIs/Line/Login/Route.php#L116-L118"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/form-notify/trunk/src/APIs/Line/Login/User.php#L53"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/form-notify/trunk/src/APIs/Line/Login/User.php#L72"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3517908%40form-notify\u0026new=3517908%40form-notify\u0026sfp_email=\u0026sfph_mail="
    },
    {
      "source": "security@wordfence.com",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/2f0a7d6f-9b95-4052-bab3-85aca01f6ab7?source=cve"
    }
  ],
  "sourceIdentifier": "security@wordfence.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-287"
        }
      ],
      "source": "security@wordfence.com",
      "type": "Primary"
    }
  ]
}


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