FKIE_CVE-2026-12399

Vulnerability from fkie_nvd - Published: 2026-06-27 08:16 - Updated: 2026-06-27 08:16
Severity
4.4 (Medium) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N
Summary
The Gutenverse – WordPress Blocks, Page Builder & Site Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 3.8.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with editor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
References
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/gutenverse/tags/3.6.3/lib/framework/helper.php#L1440
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/gutenverse/tags/3.6.3/lib/framework/helper.php#L1775
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/gutenverse/tags/3.6.3/lib/framework/includes/class-api.php#L1956
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/gutenverse/tags/3.6.3/lib/framework/includes/class-frontend-generator.php#L147
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/gutenverse/tags/3.6.3/lib/framework/includes/class-global-variable.php#L78
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/gutenverse/tags/3.8.0/lib/framework/helper.php#L1440
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/gutenverse/tags/3.8.0/lib/framework/helper.php#L1775
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/gutenverse/tags/3.8.0/lib/framework/includes/class-api.php#L1956
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/gutenverse/tags/3.8.0/lib/framework/includes/class-frontend-generator.php#L147
security@wordfence.comhttps://plugins.trac.wordpress.org/browser/gutenverse/tags/3.8.0/lib/framework/includes/class-global-variable.php#L78
security@wordfence.comhttps://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old=3578328%40gutenverse&new=3578328%40gutenverse&sfp_email=&sfph_mail=
security@wordfence.comhttps://www.wordfence.com/threat-intel/vulnerabilities/id/fd1c679b-43e0-4e3a-ae2d-f6ff8a657512?source=cve
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Gutenverse \u2013 WordPress Blocks, Page Builder \u0026 Site Editor",
          "vendor": "jegstudio",
          "versions": [
            {
              "lessThanOrEqual": "3.8.0",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@wordfence.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The Gutenverse \u2013 WordPress Blocks, Page Builder \u0026 Site Editor plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 3.8.0 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with editor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled."
    }
  ],
  "id": "CVE-2026-12399",
  "lastModified": "2026-06-27T08:16:44.443",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.4,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "HIGH",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.3,
        "impactScore": 2.7,
        "source": "security@wordfence.com",
        "type": "Primary"
      }
    ]
  },
  "published": "2026-06-27T08:16:44.443",
  "references": [
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.6.3/lib/framework/helper.php#L1440"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.6.3/lib/framework/helper.php#L1775"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.6.3/lib/framework/includes/class-api.php#L1956"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.6.3/lib/framework/includes/class-frontend-generator.php#L147"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.6.3/lib/framework/includes/class-global-variable.php#L78"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.8.0/lib/framework/helper.php#L1440"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.8.0/lib/framework/helper.php#L1775"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.8.0/lib/framework/includes/class-api.php#L1956"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.8.0/lib/framework/includes/class-frontend-generator.php#L147"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/browser/gutenverse/tags/3.8.0/lib/framework/includes/class-global-variable.php#L78"
    },
    {
      "source": "security@wordfence.com",
      "url": "https://plugins.trac.wordpress.org/changeset?sfp_email=\u0026sfph_mail=\u0026reponame=\u0026old=3578328%40gutenverse\u0026new=3578328%40gutenverse\u0026sfp_email=\u0026sfph_mail="
    },
    {
      "source": "security@wordfence.com",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/fd1c679b-43e0-4e3a-ae2d-f6ff8a657512?source=cve"
    }
  ],
  "sourceIdentifier": "security@wordfence.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security@wordfence.com",
      "type": "Primary"
    }
  ]
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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