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CVE-2026-12902— Kadence Blocks <= 3.7.7 - Missing Authorization to Authenticated (Contributor+) Arbitrary Media Attachment Creation via kadence_import_process_pattern/kadence_import_process_data AJAX Actions

CVSS 4.3 · Medium EPSS 0.27% · P19

Possible ATT&CK Techniques 1AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProductVersion RangeStatus
stellarwpKadence Blocks — Page Builder Toolkit for Gutenberg Editor≤ 3.7.7affected
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I. Basic Information for CVE-2026-12902

Vulnerability Information
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Vulnerability Title
Kadence Blocks <= 3.7.7 - Missing Authorization to Authenticated (Contributor+) Arbitrary Media Attachment Creation via kadence_import_process_pattern/kadence_import_process_data AJAX Actions
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制缺失
Source: NVD (National Vulnerability Database)
Vulnerability Title
Nexcess Kadence Blocks 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Nexcess Kadence Blocks是Nexcess公司的一款构建网站内容的框架。 Nexcess Kadence Blocks 3.7.7及之前版本存在授权问题漏洞，该漏洞源于插件未正确验证用户授权执行操作，可能导致经过身份验证的攻击者（具有贡献者级别及以上访问权限）通过wp_upload_bits()和wp_insert_attachment()下载远程图像到站点上传目录，从而创建任意媒体库附件，绕过upload_files能力边界。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
stellarwpKadence Blocks — Page Builder Toolkit for Gutenberg Editor 0 ~ 3.7.7 -

II. Public POCs for CVE-2026-12902

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III. Intelligence Information for CVE-2026-12902

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Patches & Fixes for CVE-2026-12902 (1)

Vendor Advisories for CVE-2026-12902 (1)

Same Patch Batch · stellarwp · 2026-07-01 · 4 CVEs total

CVE-2026-132466.4 MEDIUMGiveWP <= 4.16.0 - Authenticated (Author+) Stored Cross-Site Scripting via 'block_id' Shor
CVE-2026-119814.3 MEDIUMGiveWP <= 4.15.3 - Cross-Site Request Forgery
CVE-2026-129044.3 MEDIUMKadence Blocks <= 3.7.7 - Insecure Direct Object Reference to Authenticated (Contributor+)

IV. Related Vulnerabilities

Same product: Kadence Blocks — Page Builder Toolkit for Gutenberg Editor
Same vendor: stellarwp
Same weakness: CWE-862

V. Comments for CVE-2026-12902

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