# Live Composer <= 2.1.22 - Authenticated (Author+) Stored Cross-Site Scripting via Custom URL Post Meta

- **ID:** WPSEC-2026-2549
- **Plugin:** Live Composer – Free WordPress Website Builder (`live-composer-page-builder`), https://wordpress.org/plugins/live-composer-page-builder/
- **Affected versions:** all versions before 2.1.23
- **Fixed in:** 2.1.23 (Update to 2.1.23 or later.)
- **Severity:** Medium 6.4 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N)
- **Weakness:** CWE-79
- **Usage among sites WPSec scans:** plugin Low, affected versions Low (as of 2026-11-05)
- **Attack surface analysis:** https://attacksurface.wpsec.com/plugin/live-composer-page-builder
- **Fix released:** 2026-11-04
- **Published:** 2026-11-05
- **URL:** https://wpsec.com/vuln/WPSEC-2026-2549/

## Description

The Live Composer plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the custom URL post meta of Projects (dslc_project_url), Partners (dslc_partner_url) and Galleries (dslc_custom_url) items in all versions up to, and including, 2.1.22, due to insufficient input sanitization and output escaping of these URLs in anchor href attributes rendered by the Projects, Partners and Galleries modules. This makes it possible for authenticated attackers, with author-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses a page displaying the affected module.

## References

- https://wpsec.com/vuln/WPSEC-2026-2549/
- https://plugins.svn.wordpress.org/live-composer-page-builder/tags/2.1.23/
- https://wordpress.org/plugins/live-composer-page-builder/

Source: WPSec, https://wpsec.com/vuln/WPSEC-2026-2549/

License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Free to use, share and adapt, also commercially, if you credit WPSec and link to this advisory.