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CVE-2026-3651— Build App Online <= 1.0.23 - Missing Authorization to Arbitrary Post Author Modification via 'build-app-online-update-vendor-product' AJAX Action

Quick assessment

Affected
hakeemnala Build App Online
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Build App Online 1.0.23及之前版本存在安全漏洞，该漏洞源于缺少身份验证检查、能力验证和非ce验证，可能导致未经身份验证的攻击者修改任意文章的作者字段。

CVSS 5.3 · Medium EPSS 0.51% · P41
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I. Basic Information for CVE-2026-3651

Vulnerability Information
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Vulnerability Title
Build App Online <= 1.0.23 - Missing Authorization to Arbitrary Post Author Modification via 'build-app-online-update-vendor-product' AJAX Action
Source: CVE Program / CVE List V5
Vulnerability Description
The Build App Online plugin for WordPress is vulnerable to unauthorized access in all versions up to, and including, 1.0.23. This is due to the plugin registering the 'build-app-online-update-vendor-product' AJAX action via wp_ajax_nopriv_ without proper authentication checks, capability verification, or nonce validation in the update_vendor_product() function. The function accepts a user-supplied post ID from the request and calls wp_update_post() to modify the post_author field without validating whether the user has permission to modify the specified post. This makes it possible for unauthenticated attackers to modify the post_author of arbitrary posts to 0 (orphaning posts from their legitimate authors), or for authenticated attackers to claim ownership of any post by setting themselves as the author.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
WordPress plugin Build App Online 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WordPress和WordPress plugin都是WordPress基金会的产品。WordPress是一套使用PHP语言开发的博客平台。该平台具有在基于PHP和MySQL的服务器上架设个人博客网站的功能。WordPress plugin是一个应用插件。 WordPress plugin Build App Online 1.0.23及之前版本存在安全漏洞，该漏洞源于缺少身份验证检查、能力验证和非ce验证，可能导致未经身份验证的攻击者修改任意文章的作者字段。
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

Vendor Product Affected Versions CPE Subscribe
hakeemnala Build App Online * ~ 1.0.23 -

II. Public POCs for CVE-2026-3651

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III. Intelligence Information for CVE-2026-3651

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Patches & Fixes for CVE-2026-3651 (6)

Vendor Advisories for CVE-2026-3651 (1)

IV. Related Vulnerabilities

Same product: Build App Online
Same vendor: hakeemnala
Same weakness: CWE-862

V. Comments for CVE-2026-3651

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