CVE-2026-16786

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.

• CWE-79

• https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.18/modules/testimonials/module.php#L5024
• https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.18/modules/testimonials/module.php#L5251
• https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.18/modules/testimonials/module.php#L5257
• https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.18/modules/testimonials/module.php#L5291
• https://plugins.trac.wordpress.org/changeset?reponame=&old=3662813%40live-composer-page-builder&new=3662813%40live-composer-page-builder
• https://www.wordfence.com/threat-intel/vulnerabilities/id/852b1766-8674-44a0-843c-381cd4155a2b?source=cve

Published

Sep 1, 2026

Last Modified

Sep 1, 2026

Status

Deferred

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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