{"cve":"CVE-2026-13203","nvd":{"published":"2026-09-01T05:17:08.713","modified":"2026-09-01T20:47:54.130","status":"Deferred","description":"The Live Composer – Free WordPress Website Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'custom_id' shortcode attribute of the dslc_modules_section and dslc_modules_area shortcodes in versions up to, and including, 2.1.19. This is due to insufficient input sanitization and output escaping on the user-supplied attribute, which is concatenated into the HTML id=\"\" attribute of the rendered <div> element in the dslc_modules_section_front() and dslc_modules_area_front() functions without esc_attr(). 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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N","score":6.4},"cwes":["CWE-79"],"references":["https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.13/includes/display-functions.php#L1882","https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.13/includes/display-functions.php#L1888","https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.13/includes/display-functions.php#L1922","https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.13/includes/display-functions.php#L2107","https://plugins.trac.wordpress.org/browser/live-composer-page-builder/tags/2.1.13/includes/display-functions.php#L2113"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:50:50.842544443+00:00"},"epss":{"cve":"CVE-2026-13203","score":0.00419,"percentile":0.36222,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}