FKIE_CVE-2026-6378

Vulnerability from fkie_nvd - Published: 2026-05-02 04:16 - Updated: 2026-05-05 19:17
Severity ?
6.4 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Summary
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.
References
security@wordfence.comhttps://github.com/maxi-blocks/maxi-blocks/pull/6250/changes/8db3267df9858f684e420566227ed2ea7954d9a9
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L1010
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L1021
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L979
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L981
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L987
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.9/core/class-maxi-api.php#L221
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.9/core/class-maxi-api.php#L979
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.9/core/class-maxi-style-cards.php#L197
security@wordfence.comhttps://www.wordfence.com/threat-intel/vulnerabilities/id/22f05048-df38-4f26-82a3-53caac995283?source=cve
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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": "CVE-2026-6378",
  "lastModified": "2026-05-05T19:17:22.860",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 6.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.1,
        "impactScore": 2.7,
        "source": "security@wordfence.com",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-05-02T04:16:11.990",
  "references": [
    {
      "source": "security@wordfence.com",
      "url": "https://github.com/maxi-blocks/maxi-blocks/pull/6250/changes/8db3267df9858f684e420566227ed2ea7954d9a9"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L1010"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L1021"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L979"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L981"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.10/core/class-maxi-api.php#L987"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.9/core/class-maxi-api.php#L221"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.9/core/class-maxi-api.php#L979"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/maxi-blocks/tags/2.1.9/core/class-maxi-style-cards.php#L197"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/22f05048-df38-4f26-82a3-53caac995283?source=cve"
    }
  ],
  "sourceIdentifier": "security@wordfence.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security@wordfence.com",
      "type": "Primary"
    }
  ]
}


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