GHSA-VQ42-9GX3-GJ3V

Vulnerability from github – Published: 2026-09-01 12:31 – Updated: 2026-09-01 12:31
VLAI
Details

The Live Composer – Free WordPress Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via dslc_module_testimonials_output Shortcode in all versions up to, and including, 2.1.19 due to insufficient input sanitization and output escaping. 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. The injected payload survives save-time wp_kses_post filtering because KSES treats shortcode delimiters as opaque, and the unescaped fields — including main_heading_title, view_all_link, main_heading_link_title, and main_filter_title_all — are only rendered when do_shortcode() executes at page-view time.

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-2026-16786"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-01T10:17:11Z",
    "severity": "MODERATE"
  },
  "details": "The Live Composer \u2013 Free WordPress Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via dslc_module_testimonials_output Shortcode in all versions up to, and including, 2.1.19 due to insufficient input sanitization and output escaping. 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. The injected payload survives save-time wp_kses_post filtering because KSES treats shortcode delimiters as opaque, and the unescaped fields \u2014 including main_heading_title, view_all_link, main_heading_link_title, and main_filter_title_all \u2014 are only rendered when do_shortcode() executes at page-view time.",
  "id": "GHSA-vq42-9gx3-gj3v",
  "modified": "2026-09-01T12:31:47Z",
  "published": "2026-09-01T12:31:47Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-16786"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.18/modules/testimonials/module.php#L5024"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.18/modules/testimonials/module.php#L5251"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.18/modules/testimonials/module.php#L5257"
    },
    {
      "type": "WEB",
      "url": "https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.18/modules/testimonials/module.php#L5291"
    },
    {
      "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/852b1766-8674-44a0-843c-381cd4155a2b?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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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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