CVE-2026-84021: CWE-79 Cross-Site Scripting (XSS) in Bold Page Builder
Description
CVE-2026-84021 is a Cross-Site Scripting (XSS) vulnerability in the Bold Page Builder WordPress plugin before version 5.9.8. It occurs because the plugin does not properly validate link URLs before outputting them in HTML attributes, relying on a filter that can be bypassed. This allows users with Contributor role or higher to inject arbitrary scripts that execute when a user clicks the affected link.
CVSS v3.1
Score 6.8medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Bold Page Builder WordPress plugin versions prior to 5.9.8 contain a CWE-79 Cross-Site Scripting vulnerability. The issue arises from improper validation of link URLs before they are output in HTML attributes. The plugin relies on a filter for validation, but this filter can be evaded, enabling users with Contributor role or above to inject malicious scripts. These scripts execute upon user interaction with the affected link, potentially compromising confidentiality, integrity, and availability of the affected site or user session.
Potential Impact
Successful exploitation allows users with Contributor role or higher to inject arbitrary web scripts that execute when a user clicks the affected link. This can lead to unauthorized actions, data theft, or session hijacking, impacting confidentiality, integrity, and availability of the affected WordPress site.
Mitigation Recommendations
No official patch or fix is currently confirmed for this vulnerability. Users should monitor the vendor's advisory for updates and apply the official fix once available. Until then, restrict Contributor role permissions where possible and avoid clicking suspicious links generated by the plugin.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-v5jf-q9wj-fxfx
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-84021"]
- State
- PUBLISHED
Threat ID: 6a9c257cacd9273b49fa811c
Added to database: 09/05/2026, 14:21:48 UTC
Last enriched: 09/07/2026, 15:10:22 UTC
Last updated: 10/19/2026, 18:48:24 UTC
Views: 34
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