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.

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Fixes

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History

Wed, 16 Sep 2026 11:00:00 +0000

Type Values Removed Values Added
First Time appeared Bold-themes
Bold-themes bold Page Builder
Wordpress
Wordpress wordpress
Vendors & Products Bold-themes
Bold-themes bold Page Builder
Wordpress
Wordpress wordpress

Wed, 16 Sep 2026 04:45:00 +0000

Type Values Removed Values Added
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.
Title Bold Page Builder <= 5.9.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'shortcode_content' Parameter
Weaknesses CWE-79
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: Wordfence

Published:

Updated: 2026-09-16T18:56:05.108Z

Reserved: 2026-04-08T20:44:00.842Z

Link: CVE-2026-5920

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-09-16T05:16:46.913

Modified: 2026-09-16T17:53:40.500

Link: CVE-2026-5920

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-16T18:15:15Z

Weaknesses