GHSA-8P3W-9597-PWH9

Vulnerability from github – Published: 2026-05-02 06:30 – Updated: 2026-05-02 06:30
VLAI?
Details

The Maxi Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the /wp-json/maxi-blocks/v1.0/style-card REST API endpoint in all versions up to, and including, 2.1.9 due to insufficient input sanitization and output escaping of the sc_styles parameter. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts that execute on every page where the plugin's style card styles are loaded, including across the entire WordPress admin panel.

Severity ?
6.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Show details on source website
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{
  "affected": [],
  "aliases": [
    "CVE-2026-6378"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-02T04:16:11Z",
    "severity": "MODERATE"
  },
  "details": "The Maxi Blocks plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the `/wp-json/maxi-blocks/v1.0/style-card` REST API endpoint in all versions up to, and including, 2.1.9 due to insufficient input sanitization and output escaping of the `sc_styles` parameter. This makes it possible for authenticated attackers, with Author-level access and above, to inject arbitrary web scripts that execute on every page where the plugin\u0027s style card styles are loaded, including across the entire WordPress admin panel.",
  "id": "GHSA-8p3w-9597-pwh9",
  "modified": "2026-05-02T06:30:23Z",
  "published": "2026-05-02T06:30:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-6378"
    },
    {
      "type": "WEB",
      "url": "https://github.com/maxi-blocks/maxi-blocks/pull/6250/changes/8db3267df9858f684e420566227ed2ea7954d9a9"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L1010"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L1021"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L979"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L981"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L987"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.9/core/class-maxi-api.php#L221"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.9/core/class-maxi-api.php#L979"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.9/core/class-maxi-style-cards.php#L197"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/22f05048-df38-4f26-82a3-53caac995283?source=cve"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}


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