CVE-2026-13295

Vulnerability Description

The Page Builder by SiteOrigin plugin for WordPress is vulnerable to Stored Cross-Site Scripting via panels_data Parameter in all versions up to, and including, 2.34.3 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. This is possible because the nonce and edit_post capability checks enforced during save are both satisfied by Contributor-level users for their own posts, and the panels_data value is stored as post meta — outside the scope of WordPress's unfiltered_html carve-out — meaning no wp_kses fallback prevents the unsanitized WP_Widget_Custom_HTML content from being persisted and later rendered verbatim on the frontend.

CVSS Score

Related Weaknesses (CWE)

References

• https://plugins.trac.wordpress.org/browser/siteorigin-panels/tags/2.34.1/inc/adm
• https://plugins.trac.wordpress.org/browser/siteorigin-panels/tags/2.34.1/inc/adm
• https://plugins.trac.wordpress.org/browser/siteorigin-panels/tags/2.34.1/inc/adm
• https://plugins.trac.wordpress.org/browser/siteorigin-panels/tags/2.34.1/inc/ren
• https://plugins.trac.wordpress.org/browser/siteorigin-panels/tags/2.34.3/inc/adm
• https://plugins.trac.wordpress.org/browser/siteorigin-panels/tags/2.34.3/inc/adm
• https://plugins.trac.wordpress.org/browser/siteorigin-panels/tags/2.34.3/inc/adm
• https://plugins.trac.wordpress.org/browser/siteorigin-panels/tags/2.34.3/inc/ren
• https://plugins.trac.wordpress.org/changeset?sfp_email=&sfph_mail=&reponame=&old
• https://www.wordfence.com/threat-intel/vulnerabilities/id/7830b3dc-7d20-4516-b4d