GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

GHSA-4G6M-8FW6-3C27

Vulnerability from github – Published: 2026-09-05 09:30 – Updated: 2026-09-05 09:30
VLAI
Details

The Ninja Forms – The Contact Form Builder That Grows With You plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Repeater Child 'type' Confusion via Unmatched Array Key in all versions up to, and including, 3.15.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the Ninja Forms File Uploads add-on to be active, as the attack routes the unwhitelisted child entry through the File Uploads handler to write an attacker-supplied HTML file containing arbitrary JavaScript into any web-server-writable directory, including the site root, where it is served from the site's own origin.

Severity
7.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Show details on source website
To clipboard 

{
  "affected": [],
  "aliases": [
    "CVE-2026-19769"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-05T07:17:11Z",
    "severity": "HIGH"
  },
  "details": "The Ninja Forms \u2013 The Contact Form Builder That Grows With You plugin for WordPress is vulnerable to Stored Cross-Site Scripting via Repeater Child \u0027type\u0027 Confusion via Unmatched Array Key in all versions up to, and including, 3.15.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the Ninja Forms File Uploads add-on to be active, as the attack routes the unwhitelisted child entry through the File Uploads handler to write an attacker-supplied HTML file containing arbitrary JavaScript into any web-server-writable directory, including the site root, where it is served from the site\u0027s own origin.",
  "id": "GHSA-4g6m-8fw6-3c27",
  "modified": "2026-09-05T09:30:21Z",
  "published": "2026-09-05T09:30:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-19769"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Submission.php#L303"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Submission.php#L55"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Submission.php#L609"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/ninja-forms/tags/3.14.11/includes/AJAX/Controllers/Submission.php#L61"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset/3674413/ninja-forms/trunk/includes/AJAX/Controllers/Submission.php"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?old_path=%2Fninja-forms/tags/3.15.1\u0026new_path=%2Fninja-forms/tags/3.15.2"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026new=3674413%40ninja-forms%2Ftags%2F3.15.2\u0026old=3663678%40ninja-forms%2Ftags%2F3.15.1"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/2330e381-7db3-4b79-8827-818d2ea954b5?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.