The Live Composer – Free WordPress Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via dslcmoduletestimonialsoutput 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 wpksespost filtering because KSES treats shortcode delimiters as opaque, and the unescaped fields — including mainheadingtitle, viewalllink, mainheadinglinktitle, and mainfiltertitleall — are only rendered when doshortcode() executes at page-view time.

The Live Composer – Free WordPress Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via dslcmoduleprojectsoutput 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. WordPress's shortcode-aware kses handling preserves the serialized shortcode body as a placeholder before content filtering runs, allowing attacker-controlled values such as viewalllink, mainheadinglinktitle, mainfiltertitleall, and buttontext to reach render-time sinks entirely unescaped.