Gravity Booster <= 5.26 - Authenticated (Editor+) Stored Cross-Site Scripting via 'stylerSettings' Parameter
Key facts
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
- Attack complexity
- High
- 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 Gravity Booster – Styles & Layouts for Gravity Forms plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 5.26 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with editor-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.
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-2026-12477
- 2026-10-03 Alias added: GHSA-5w9q-5r59-3g9f
References
Other 6
- https://www.wordfence.com/threat-intel/vulnerabilities/id/413e5515-6cc9-4fa9-908e-2dc68778f5cb?source=cve
- https://plugins.trac.wordpress.org/browser/styles-and-layouts-for-gravity-forms/tags/5.26/display/class-styles.php#L76
- https://plugins.trac.wordpress.org/browser/styles-and-layouts-for-gravity-forms/tags/5.26/display/class-styles.php#L147
- https://plugins.trac.wordpress.org/browser/styles-and-layouts-for-gravity-forms/tags/5.26/display/class-styles.php#L148
- https://plugins.trac.wordpress.org/browser/styles-and-layouts-for-gravity-forms/tags/5.26/includes/admin/fetch/stla-admin-fetch-content-area.php#L290
- https://plugins.trac.wordpress.org/changeset?reponame=&old=3637650%40styles-and-layouts-for-gravity-forms&new=3637650%40styles-and-layouts-for-gravity-forms
More wpmonks vulnerabilities
- TI-2024-35055 Unrestricted file upload in wpmonks Sage AI: Chatbots, OpenAI GPT-4 Bulk Articles… CVSS 3.1CRITICAL 9.9
- TI-2024-09931 Styler for Ninja Forms <= 3.3.4 - Authenticated (Subscriber+) Arbitrary Option Deletion via deactivate_license CVSS 3.1MEDIUM 6.5
- TI-2026-51994 Missing authorization in wpmonks Gravity Booster – Styles & Layouts for Gravity… CVSS 3.1MEDIUM 5.4
Sources
- CVE-2026-12477 · CVE Program
- CVE-2026-12477 · NVD
- FIRST EPSS
- GHSA-5w9q-5r59-3g9f · 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