CVE-2026-16786

medium

Description

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.

References

https://www.wordfence.com/threat-intel/vulnerabilities/id/852b1766-8674-44a0-843c-381cd4155a2b?source=cve

https://plugins.trac.wordpress.org/changeset?reponame=&old=3662813%40live-composer-page-builder&new=3662813%40live-composer-page-builder

https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.18/modules/testimonials/module.php#L5291

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#L5251

https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.18/modules/testimonials/module.php#L5024

Details

Source: Mitre, NVD

Published: 2026-09-01

Updated: 2026-09-01

Risk Information

CVSS v2

Base Score: 5.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 6.4

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Severity: Medium

EPSS

EPSS: 0.00334