CVE-2026-5920

MEDIUM 6.4

Bold Page Builder <= 5.9.6 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'shortcode_content' Parameter

CVSS Score

6.4

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	boldthemes
Product	bold page builder
Published	Sep 16, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N

Attack Vector

Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

Affected Versions

boldthemes / Bold Page Builder

0 ≤ 5.9.6

References

NVD ↗ CVE.org ↗ EPSS Data ↗

wordfence.com: https://www.wordfence.com/threat-intel/vulnerabilities/id/629fee36-1fea-4a4d-acc2-9ba18d0b6487?source=cve 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

Credits

suyoung kim(AhnLab)