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CVE-2026-6170: Bold Page Builder <= 5.7.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via bt_bb_css_image_grid 'images' Shortcode Attribute

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-30 · updated 2026-09-30
• Weakness: CWE-79

Description

The Bold Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'images' parameter of the plugin's bt_bb_css_image_grid shortcode in all versions up to, and including, 5.7.2 due to insufficient input sanitization and output escaping on user-supplied attributes. 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 products

• boldthemes Bold Page Builder: through 5.7.2

References

• https://plugins.trac.wordpress.org/changeset/3526548/bold-page-builder/trunk/content_elements/bt_bb_css_image_grid/bt_bb_css_image_grid.php
• https://www.wordfence.com/threat-intel/vulnerabilities/id/9b359cdd-840f-4a9b-9a2f-a28e64d73819?source=cve

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