CVE-2026-12902: CWE-862 Missing Authorization in stellarwp Kadence Blocks — Page Builder Toolkit for Gutenberg Editor
The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.7.7. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to create arbitrary Media Library attachments by downloading remote images to the site's uploads directory via wp_upload_bits() and wp_insert_attachment(), bypassing the upload_files capability boundary.
AI Analysis
Technical Summary
CVE-2026-12902 is an authorization bypass vulnerability (CWE-862) in the Kadence Blocks — Page Builder Toolkit for Gutenberg Editor WordPress plugin. The vulnerability affects all versions up to and including 3.7.7. It allows authenticated users with contributor-level privileges or higher to bypass the upload_files capability boundary and create arbitrary media attachments by leveraging functions wp_upload_bits() and wp_insert_attachment() without proper authorization checks. This flaw arises from missing verification that the user is authorized to perform the action, enabling unauthorized media uploads.
Potential Impact
The vulnerability allows authenticated users with contributor-level access or above to upload arbitrary media files to the WordPress Media Library by downloading remote images to the uploads directory. While this does not directly impact confidentiality or availability, it allows unauthorized content insertion, which could be used for further attacks or to bypass content restrictions. The CVSS 3.1 base score is 4.3 (medium severity), reflecting low impact on confidentiality and availability but some impact on integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch is currently documented. Until a patch is available, restrict contributor-level access and above to trusted users only and monitor plugin updates from stellarwp for a security update addressing this issue.
CVE-2026-12902: CWE-862 Missing Authorization in stellarwp Kadence Blocks — Page Builder Toolkit for Gutenberg Editor
Description
The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.7.7. This is due to the plugin not properly verifying that a user is authorized to perform an action. This makes it possible for authenticated attackers, with contributor-level access and above, to create arbitrary Media Library attachments by downloading remote images to the site's uploads directory via wp_upload_bits() and wp_insert_attachment(), bypassing the upload_files capability boundary.
CVSS v3.1
Score 4.3medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-12902 is an authorization bypass vulnerability (CWE-862) in the Kadence Blocks — Page Builder Toolkit for Gutenberg Editor WordPress plugin. The vulnerability affects all versions up to and including 3.7.7. It allows authenticated users with contributor-level privileges or higher to bypass the upload_files capability boundary and create arbitrary media attachments by leveraging functions wp_upload_bits() and wp_insert_attachment() without proper authorization checks. This flaw arises from missing verification that the user is authorized to perform the action, enabling unauthorized media uploads.
Potential Impact
The vulnerability allows authenticated users with contributor-level access or above to upload arbitrary media files to the WordPress Media Library by downloading remote images to the uploads directory. While this does not directly impact confidentiality or availability, it allows unauthorized content insertion, which could be used for further attacks or to bypass content restrictions. The CVSS 3.1 base score is 4.3 (medium severity), reflecting low impact on confidentiality and availability but some impact on integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch is currently documented. Until a patch is available, restrict contributor-level access and above to trusted users only and monitor plugin updates from stellarwp for a security update addressing this issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Wordfence
- Date Reserved
- 2026-06-22T14:18:49.277Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a44a07727e9c79719fbd4f5
Added to database: 07/01/2026, 05:07:03 UTC
Last enriched: 07/08/2026, 13:08:46 UTC
Last updated: 08/14/2026, 13:30:12 UTC
Views: 55
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