CVE-2026-2826
MediumCVSS 4.3Exploitation Probability (EPSS)
Low risk22th percentile - higher than 22% of all known CVEs
Summary
The Kadence Blocks plugin for WordPress up to version 3.6.3 has an authorization bypass in the process_pattern REST API endpoint, which does not properly verify the upload_files capability. Authenticated attackers with contributor level access or above can upload images to the Media Library by supplying remote image URLs.
Risk Assessment
An attacker can upload malicious images (e.g., with backdoors) to the Media Library, potentially leading to further site compromise.
Recommendation
Update the Kadence Blocks plugin to the latest version. Restrict contributor permissions to the minimum necessary.
Other vulnerabilities in Kadence Blocks
See all- CVE-2026-66696Medium
A Sensitive Data Exposure vulnerability at the contributor level in the Gutenberg Blocks by Kadence Blocks plugin (versions up to 3.7.8) allows a user with the contributor role to access sensitive data that should not be available to them.
- CVE-2026-18062Medium
The Kadence Blocks plugin for WordPress up to version 3.7.8.1 contains a Stored Cross-Site Scripting (XSS) vulnerability in the Identity Block Inner Image Content. This is due to insufficient input sanitization and output escaping, allowing authenticated attackers with contributor-level access and above to inject arbitrary web scripts.
- CVE-2026-12904Medium
The Kadence Blocks plugin for WordPress up to version 3.7.7 is vulnerable to Insecure Direct Object Reference (IDOR). The authorization check uses a user-supplied post_id, but the actual read/delete operations on optimizer analysis records are performed using a hash of the post_path, which can be manipulated by the attacker. This allows authenticated attackers with Contributor-level access or higher to read or delete analysis records belonging to other users' posts.
- CVE-2026-12902Medium
The Kadence Blocks plugin for WordPress up to version 3.7.7 fails to properly verify user authorization, allowing authenticated attackers with contributor-level access or higher to create arbitrary Media Library attachments. Attackers can remotely download images to the uploads directory, bypassing the upload_files capability boundary.
Original NVD description (English source)
The Kadence Blocks — Page Builder Toolkit for Gutenberg Editor plugin for WordPress is vulnerable to authorization bypass in all versions up to, and including, 3.6.3. This is due to the plugin not properly verifying that a user has the `upload_files` capability in the `process_pattern` REST API endpoint. This makes it possible for authenticated attackers, with contributor level access and above, to upload images to the WordPress Media Library by supplying remote image URLs that the server downloads and creates as media attachments.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS