Bold Page Builder shortcode attributes permit Contributor stored XSS

Bold Page Builder through 5.6.8 fails to sanitize and contextually escape attacker-controlled attributes of the bt_bb_shortcode shortcode. A Contributor can store an attribute-breaking script payload in post content, and the script executes when any visitor, including an administrator, views the rendered page. The public.

CVE / CNA score 6.4 CVSS 3.1 · security@wordfence.com

NVD score Pending NVD has not published its own CVSS assessment.

Component: Bold Page Builder
Plugin slug: bold-page-builder
Affected: <= 5.6.8
Safe version: See mitigation notes
Published: Aug 16, 2026
Weakness: CWE-79 — Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

This CVE was published Aug 16, 2026 and is one of 40 known issues for this plugin.

What to do

Update, patch or deactivate.

No fixed release is identified in the authoritative record. Update when a confirmed patch is available; until then, restrict Contributors or disable the affected shortcode, review authored content, and invalidate privileged sessions if malicious pages were viewed. The official upstream changelog lists version 5.9.6, which is newer than the published affected range. Its changelog does not clearly confirm this specific fix, so it is not counted as a known-safe release.

No confirmed safe version is listed. Consider a vendor-supported patch or temporarily restricting the affected functionality while you assess the risk.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The Bold Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'bt_bb_shortcode' shortcode in all versions up to, and including, 5.6.8 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.

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

References

Primary and upstream sources

Data attribution: This product uses the NVD API but is not endorsed or certified by the NVD.

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