WPBakery Page Builder <= 8.7.4 - Authenticated (Subscriber+) Stored Cross-Site Scripting via 'data' Parameter
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Cross-site scripting
- Confidentiality · integrity · availability
- Low · Low · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-79.
Summary
The WPBakery Page Builder plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the 'data' parameter in all versions up to, and including, 8.7.4 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with subscriber-level access and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. The wp_kses_post sanitization applied during save does not neutralize the payload because the malicious script content is base64-encoded as plain alphanumeric text with no HTML tags to strip; the vc_raw_html shortcode template then decodes and echoes this content unescaped at render time.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-15101
- 2026-10-03 Alias added: GHSA-pvfv-gmj3-wwvh
References
Other 5
- https://www.wordfence.com/threat-intel/vulnerabilities/id/b61ced52-30a2-407a-8659-1ae4a4d99aab?source=cve
- https://plugins.trac.wordpress.org/browser/js_composer/trunk/include/classes/core/presets/class-vc-settings-presets.php#L227
- https://plugins.trac.wordpress.org/browser/js_composer/trunk/include/autoload/hooks/vc-settings-presets.php#L56
- https://plugins.trac.wordpress.org/browser/js_composer/trunk/include/autoload/hooks/vc-settings-presets.php#L88
- https://plugins.trac.wordpress.org/browser/js_composer/trunk/include/templates/shortcodes/vc_raw_html.php#L30
More wpbakery vulnerabilities
- TI-2024-05303 WPBakery <= 7.7 - Authenticated (Author+) Local File Inclusion CVSS 3.1HIGH 8.8
- TI-2020-17378 The WPBakery plugin before 6.4.1 for WordPress allows XSS because it calls… CVSS 3.1MEDIUM 6.4
- TI-2023-14919 WordPress WPBakery Page Builder Plugin < 6.13.0 is vulnerable to Cross Site Scripting (XSS) CVSS 3.1MEDIUM 6.5
- TI-2026-86173 Stored cross-site scripting in WPBakery Page Builder author names CVSS 3.1MEDIUM 6.4
- TI-2025-34510 WordPress Templatera Plugin <= 2.3.0 - Cross Site Scripting (XSS) Vulnerability CVSS 3.1MEDIUM 6.5
- TI-2025-10227 WPBakery Page Builder <= 8.6.1 - Stored Cross-Site Scripting via vc_custom_heading Shortcode CVSS 3.1MEDIUM 6.4
Sources
- CVE-2026-15101 · CVE Program
- CVE-2026-15101 · NVD
- FIRST EPSS
- GHSA-pvfv-gmj3-wwvh · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences