GHSA-Q744-RPMQ-Q2GW

Vulnerability from github – Published: 2026-09-01 06:32 – Updated: 2026-09-01 06:32
VLAI
Details

The Live Composer – Free WordPress Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'custom_id' shortcode attribute of the dslc_modules_section and dslc_modules_area shortcodes in versions up to, and including, 2.1.19. This is due to insufficient input sanitization and output escaping on the user-supplied attribute, which is concatenated into the HTML id="" attribute of the rendered element in the dslc_modules_section_front() and dslc_modules_area_front() functions without esc_attr(). This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

Severity
6.4 (Medium)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
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{
  "affected": [],
  "aliases": [
    "CVE-2026-13203"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-01T05:17:08Z",
    "severity": "MODERATE"
  },
  "details": "The Live Composer \u2013 Free WordPress Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the \u0027custom_id\u0027 shortcode attribute of the dslc_modules_section and dslc_modules_area shortcodes in versions up to, and including, 2.1.19. This is due to insufficient input sanitization and output escaping on the user-supplied attribute, which is concatenated into the HTML id=\"\" attribute of the rendered \u003cdiv\u003e element in the dslc_modules_section_front() and dslc_modules_area_front() functions without esc_attr(). This makes it possible for authenticated attackers, with Contributor-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.",
  "id": "GHSA-q744-rpmq-q2gw",
  "modified": "2026-09-01T06:32:54Z",
  "published": "2026-09-01T06:32:54Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-13203"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.13/includes/display-functions.php#L1882"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.13/includes/display-functions.php#L1888"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.13/includes/display-functions.php#L1922"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.13/includes/display-functions.php#L2107"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.13/includes/display-functions.php#L2113"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.17/includes/display-functions.php#L1882"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.17/includes/display-functions.php#L1888"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.17/includes/display-functions.php#L1922"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.17/includes/display-functions.php#L2107"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.17/includes/display-functions.php#L2113"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/changeset?reponame=\u0026old=3662813%40live-composer-page-builder\u0026new=3662813%40live-composer-page-builder"
    },
    {
      "type": "WEB",
      "url": "https://www.wordfence.com/threat-intel/vulnerabilities/id/9b9e0302-b981-4885-822f-063247bec4b2?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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