What is CVE-2026-16787?

CVE-2026-16787 is a medium-severity vulnerability in Livecomposer Live Composer – Free WordPress Website Builder, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-09-01.

How severe is CVE-2026-16787?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in Livecomposer Live Composer – Free WordPress Website Builder

CVE-2026-16787

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.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Livecomposer Live Composer – Free Wordpress Website Builder

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Frequently asked questions

What is CVE-2026-16787?: CVE-2026-16787 is a medium-severity vulnerability in Livecomposer Live Composer – Free WordPress Website Builder, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-09-01.
How severe is CVE-2026-16787?: Medium severity. CVSS v3 base score is 6.4 out of 10.