CVE-2026-16787

Live Composer <= 2.1.19 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'dslc_custom_field' Shortcode

6.4 Medium

The Live Composer – Free WordPress Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via 'dslc_custom_field' 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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

0.33%Up 0.1 points since Sep 1, 2026

What each source reports

CVE List Score used 6.4

Live Composer <= 2.1.19 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'dslc_custom_field' Shortcode

Record: CVE-2026-16787
CVSS 3.1: 6.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

EUVDEUVD-2026-68975 6.4

Record: EUVD-2026-68975
CVSS 3.1: 6.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Updated: 2026-11-02

GitHub AdvisoriesGHSA-vhjj-j285-vx8j 6.4

The Live Composer – Free WordPress Website Builder plugin for WordPress is vulnerable to Stored...

Record: GHSA-vhjj-j285-vx8j
CVSS 3.1: 6.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

NVD 6.4

Record: CVE-2026-16787
CVSS 3.1: 6.4 MediumCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Weakness: CWE-79
Updated: 2026-11-02

Affected products

livecomposer live composer – free wordpress website builder

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-16787 is a medium vulnerability (CVSS 6.4) in Livecomposer Live Composer – Free Wordpress Website Builder, published September 1, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.33%, the 26th percentile. No source names a fixed version.