Build App Online <= 1.0.23 — Missing Authorization to Arbitrary Post Author Modification via 'build-app-online-update-vendor-product' AJAX Action
CVE-2026-3651Published · Updated Action summary
Affected: ≤1.0.23No patch available
What to do until a fix ships- Severity
- Medium5.3
- CVSS
- 5.3CVSS 3.1 · CNA (Wordfence)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:NWhat does this vector mean?
AV:NAttack vector- Network
AC:LAttack complexity- Low
PR:NPrivileges required- None
UI:NUser interaction- None
S:UScope- Unchanged
C:NConfidentiality- None
I:LIntegrity- Low
A:NAvailability- None
- Weakness
- CWE-862 Missing Authorization
- Required access
- No account needed
- Exploit prediction (EPSS)
- No score
- CISA KEV
- Not listed
On this page8
Am I affected?
Build App Online build-app-online
- Affected≤ 1.0.23
- PatchedNo fix yet
No patched version available.
You are affected if you run ≤ 1.0.23. No fixed version has been released.
- Check your version: in wp-admin go to Plugins → Installed Plugins and read the version under Build App Online.
- No admin access? Run a passive check of your site. It reads public files only.
- No account is needed to exploit this. Treat any exposed site on an affected version as at risk.
What to do
- No known patch available. Please review the vulnerability's details in depth and employ mitigations based on your organization's risk tolerance. It may be best to uninstall the affected software and find a replacement.
- Rotate administrator passwords and application secrets if the site ran a vulnerable version while publicly reachable.
- Watch Build App Online to get an email when the next vulnerability is published.
Advisory
Source description from Wordfence Intelligence, credited to Ronnachai Sretawat Na Ayutaya (Simonhaskelly), Ronnachai Chaipha (rxnr).
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.
Exploits & references
Proof-of-concept & detection
No public proof-of-concept or detection template is known for this vulnerability.
Advisories & patches
- Advisorywordfence.com
Related CVEs
More in Build App Online
All 9| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| Medium4.3 | Cross-Site Request Forgery ≤1.0.23No patch available | CVE-2025-53249 | |
| Critical9.8 | Unauthenticated Local File Inclusion ≤1.0.23No patch available | CVE-2025-32577 | |
| High8.1 | Unauthenticated Local File Inclusion ≤1.0.23No patch available | CVE-2024-49649 | |
| Medium4.3 | Cross-Site Request Forgery ≤1.0.22No patch available | CVE-2024-53751 | |
| Critical9.8 | Authentication Bypass via Header ≤1.0.21Update to 1.0.22 | CVE-2023-51478 |
- Medium4.3Cross-Site Request Forgery
≤1.0.23No patch available
- Critical9.8Unauthenticated Local File Inclusion
≤1.0.23No patch available
- High8.1Unauthenticated Local File Inclusion
≤1.0.23No patch available
- Medium4.3Cross-Site Request Forgery
≤1.0.22No patch available
- Critical9.8Authentication Bypass via Header
≤1.0.21Update to 1.0.22
Same weakness (Missing Authorization)
All Missing Authorization| Severity | Vulnerability | CVE | Published |
|---|---|---|---|
| High7.2 | Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header | CVE-2026-120688 | |
| Critical9.8 | Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission | CVE-2026-125055 | |
| Critical9.8 | Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter | CVE-2026-119077 | |
| Medium5.3 | Unauthenticated Sensitive Information Exposure in 'search' Parameter | CVE-2026-121518 |
- High7.2Unauthenticated Stored Cross-Site Scripting via Comment User-Agent Header
EZ SQL Reports Shortcode Widget and DB Backup
≤5.25.25Update to 5.26.45
- Critical9.8Unauthenticated Arbitrary File Upload via File Upload via Public Form Submission
Chatterbug Forms – Fast, Flexible WordPress Form Builder
≤1.0.2Update to 1.1
- Critical9.8Unauthenticated PHP Object Injection to Remote Code Execution via 'form' Parameter
ELEX WordPress HelpDesk & Customer Ticketing System
≤3.3.9Update to 3.4.0
- Medium5.3Unauthenticated Sensitive Information Exposure in 'search' Parameter
Customer Reviews for WooCommerce
≤5.127.0Update to 5.128.0
Timeline
CVE published
Severity medium, CVSS 5.3
Record last updated
Sources & licenses
Wordfence record- Vulnerability data
- Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. Licensed under the CC BY-SA 4.0.
- CVE® identifiers
- Copyright 1999-2026 The MITRE Corporation. Used under the CVE Program. CVE® is a registered trademark of The MITRE Corporation.
- CVSS / CWE
- National Vulnerability Database (NVD), shown unmodified. This product uses the NVD API but is not endorsed or certified by the NVD.
- VulnCrest content
- Summary, remediation guidance and page layout © VulnCrest. Not sourced from NVD.