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CVE-2026-5920

MEDIUM 6.4 CVSS 3.1
Published
September 16, 2026
Last modified
September 16, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-79
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Description

The Bold Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'shortcode_content' parameter of the bt_bb_shortcode shortcode in all versions up to, and including, 5.9.6. This is due to a bypassable security filter (bt_bb_save_pre) that can be circumvented via null byte injection, combined with insufficient output sanitization of base64-decoded content in the bt_bb_raw_content shortcode handler. 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.

Affected WordPress components

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • boldthemes Bold Page Builder — Up to and including 5.9.6

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/changeset/3668982/bold-page-builder/trunk/content_elements/bt_bb_raw_content/bt_bb_raw_content.php
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/629fee36-1fea-4a4d-acc2-9ba18d0b6487?source=cve
  • nvd.nist.gov Official NVD record