GHSA-CH22-9PPP-5952

Vulnerability from github – Published: 2026-08-16 06:30 – Updated: 2026-08-16 06:30
VLAI
Details

The Frontend Admin by DynamiApps plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 3.29.9. The vulnerability exists because ActionUser::conditions_logic() gates the current_user_can('edit_user', $user_id) authorization check behind an is_numeric() test, causing the check to be skipped entirely when $user_id is a non-numeric string — a condition that can be induced by passing a crafted value such as 1one through the unvalidated item_id parameter of the unauthenticated wp_ajax_nopriv_frontend_admin/forms/change_form AJAX endpoint. This makes it possible for attackers to escalate privileges to administrator by obtaining a server-signed _acf_objects payload carrying the non-numeric user ID, which WordPress subsequently coerces to integer 1 (the default administrator), allowing the attacker to overwrite that account's password or email address. Exploitation by unauthenticated users requires a public-facing frontend user form to be configured; in all other cases a subscriber-level account is sufficient.

Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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{
  "affected": [],
  "aliases": [
    "CVE-2026-18432"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-269"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-16T05:16:48Z",
    "severity": "CRITICAL"
  },
  "details": "The Frontend Admin by DynamiApps plugin for WordPress is vulnerable to Privilege Escalation in all versions up to, and including, 3.29.9. The vulnerability exists because `ActionUser::conditions_logic()` gates the `current_user_can(\u0027edit_user\u0027, $user_id)` authorization check behind an `is_numeric()` test, causing the check to be skipped entirely when `$user_id` is a non-numeric string \u2014 a condition that can be induced by passing a crafted value such as `1one` through the unvalidated `item_id` parameter of the unauthenticated `wp_ajax_nopriv_frontend_admin/forms/change_form` AJAX endpoint. This makes it possible for attackers to escalate privileges to administrator by obtaining a server-signed `_acf_objects` payload carrying the non-numeric user ID, which WordPress subsequently coerces to integer 1 (the default administrator), allowing the attacker to overwrite that account\u0027s password or email address. Exploitation by unauthenticated users requires a public-facing frontend user form to be configured; in all other cases a subscriber-level account is sufficient.",
  "id": "GHSA-ch22-9ppp-5952",
  "modified": "2026-08-16T06:30:25Z",
  "published": "2026-08-16T06:30:25Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-18432"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/acf-frontend-form-element/tags/3.29.3/main/frontend/forms/actions/user.php#L565"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/acf-frontend-form-element/tags/3.29.3/main/frontend/forms/actions/user.php#L680"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/acf-frontend-form-element/tags/3.29.3/main/frontend/forms/classes/display.php#L1654"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/acf-frontend-form-element/tags/3.29.3/main/frontend/forms/classes/display.php#L1953"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/acf-frontend-form-element/tags/3.29.3/main/frontend/forms/classes/display.php#L37"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/acf-frontend-form-element/tags/3.29.9/main/frontend/forms/actions/user.php#L565"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/acf-frontend-form-element/tags/3.29.9/main/frontend/forms/actions/user.php#L680"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/acf-frontend-form-element/tags/3.29.9/main/frontend/forms/classes/display.php#L1654"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/acf-frontend-form-element/tags/3.29.9/main/frontend/forms/classes/display.php#L1953"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/acf-frontend-form-element/tags/3.29.9/main/frontend/forms/classes/display.php#L37"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3633030%40acf-frontend-form-element\u0026new=3633030%40acf-frontend-form-element"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/01404fad-7b5a-485a-b557-c608fe25e6c9?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}



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