Stored Cross-Site Scripting Vulnerability in Bold Page Builder for WordPress
CVE-2026-5920

6.4MEDIUM

Key Information:

Vendor

WordPress
Status
Bold Page Builder
Vendor
CVE Published:
16 September 2026

What is CVE-2026-5920?

The Bold Page Builder plugin for WordPress is susceptible to Stored Cross-Site Scripting due to a flaw in the handling of the 'shortcode_content' parameter within the bt_bb_shortcode shortcode. This vulnerability affects all versions up to and including 5.9.6. Specifically, a security filter (bt_bb_save_pre) can be bypassed through null byte injection, leading to insufficient output sanitization of base64-decoded content in the bt_bb_raw_content shortcode handler. As a result, authenticated attackers with Contributor-level access or higher can inject arbitrary web scripts, which execute whenever a user accesses the compromised page.

Affected Version(s)

Bold Page Builder 0 <= 5.9.6

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/changeset/3668982/bold...

CVSS V3.1

Score:
6.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

suyoung kim(AhnLab)
.