---
id: CVE-2026-5920
title: >-
  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
summary: >-
  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 secur…
severity: medium
cvss: 6.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: boldthemes
product: Bold Page Builder
affected:
  - bold_page_builder <= 5.9.6
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T19:17:21.523'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-5920'
references:
  - url: >-
      https://plugins.trac.wordpress.org/changeset/3668982/bold-page-builder/trunk/content_elements/bt_bb_raw_content/bt_bb_raw_content.php
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/629fee36-1fea-4a4d-acc2-9ba18d0b6487?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-16T18:55:55.503085Z'
ingestedAt: '2026-09-16T04:49:46.353Z'
epss: 0.00227
epssPercentile: 0.13738
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.