GHSA-PQ6H-83GW-PJ9P

Vulnerability from github – Published: 2026-04-16 09:31 – Updated: 2026-04-16 09:31
VLAI?
Details

The OPEN-BRAIN plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'API Key' settings field in all versions up to, and including, 0.5.0. This is due to insufficient input sanitization and output escaping. The plugin uses sanitize_text_field() which strips HTML tags but does not encode double quotes or other HTML-special characters needed for safe attribute context output. The API key value is saved via update_option() and later output into an HTML input element's value attribute without esc_attr() escaping. This makes it possible for authenticated attackers, with Administrator-level access, to inject arbitrary web scripts via attribute breakout payloads (e.g., double quotes followed by event handlers) that execute whenever a user accesses the plugin settings page.

Severity ?
4.4 (Medium)
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
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{
  "affected": [],
  "aliases": [
    "CVE-2026-3995"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-16T07:16:30Z",
    "severity": "MODERATE"
  },
  "details": "The OPEN-BRAIN plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the \u0027API Key\u0027 settings field in all versions up to, and including, 0.5.0. This is due to insufficient input sanitization and output escaping. The plugin uses sanitize_text_field() which strips HTML tags but does not encode double quotes or other HTML-special characters needed for safe attribute context output. The API key value is saved via update_option() and later output into an HTML input element\u0027s value attribute without esc_attr() escaping. This makes it possible for authenticated attackers, with Administrator-level access, to inject arbitrary web scripts via attribute breakout payloads (e.g., double quotes followed by event handlers) that execute whenever a user accesses the plugin settings page.",
  "id": "GHSA-pq6h-83gw-pj9p",
  "modified": "2026-04-16T09:31:45Z",
  "published": "2026-04-16T09:31:44Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-3995"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L128"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L252"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L253"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/open-brain/tags/0.5.0/index.php#L272"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L128"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L252"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L253"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/open-brain/trunk/index.php#L272"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/3fe3fa95-cc1d-469b-8a97-37987b9ae362?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}


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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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