CVE-2023-51479
📋 TL;DR
This CVE describes an authenticated privilege escalation vulnerability in the WordPress Build App Online plugin. Authenticated users can exploit improper privilege management to gain higher privileges than intended. This affects all WordPress sites running Build App Online plugin versions up to 1.0.19.
💻 Affected Systems
- WordPress Build App Online plugin
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
An authenticated attacker gains administrative privileges, potentially taking full control of the WordPress site, modifying content, installing malicious plugins/themes, or accessing sensitive data.
Likely Case
Authenticated users (including low-privilege accounts) escalate to administrator roles, enabling unauthorized site modifications, data access, or persistence mechanisms.
If Mitigated
With proper access controls and monitoring, impact is limited to unauthorized privilege changes that can be detected and reverted before significant damage occurs.
🎯 Exploit Status
Exploitation requires authenticated access. The vulnerability is publicly documented with technical details available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.20 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find 'Build App Online' plugin. 4. Click 'Update Now' if update available. 5. Alternatively, download version 1.0.20+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable Build App Online Plugin
allTemporarily disable the vulnerable plugin until patched version can be installed
wp plugin deactivate build-app-online
Restrict User Registration
allLimit new user registrations to reduce attack surface
Settings → General → Membership: Uncheck 'Anyone can register'
🧯 If You Can't Patch
- Implement strict user role monitoring and alert on privilege changes
- Apply network segmentation to isolate WordPress installation and limit lateral movement
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Build App Online → Version. If version is 1.0.19 or earlier, system is vulnerable.Check Version:
wp plugin get build-app-online --field=versionVerify Fix Applied:
After update, verify Build App Online plugin shows version 1.0.20 or higher in WordPress plugins list.📡 Detection & Monitoring
Log Indicators:
- WordPress user role change events
- Unexpected admin user creation
- Plugin activation/deactivation logs
Network Indicators:
- Unusual authentication patterns from low-privilege users
- Admin panel access from non-admin accounts
SIEM Query:
source="wordpress" (event="user_role_change" OR event="user_created") AND (new_role="administrator" OR user_login="*admin*")🔗 References
- https://patchstack.com/database/vulnerability/build-app-online/wordpress-build-app-online-plugin-1-0-19-authenticated-privilege-escalation-vulnerability?_s_id=cve
- https://patchstack.com/database/vulnerability/build-app-online/wordpress-build-app-online-plugin-1-0-19-authenticated-privilege-escalation-vulnerability?_s_id=cve
