CVE-2023-46148
📋 TL;DR
This CVE-2023-46148 is a Missing Authorization vulnerability in the Themify Ultra WordPress theme that allows authenticated users to change arbitrary settings without proper permission checks. It affects WordPress sites using Themify Ultra theme versions up to 7.3.5. Attackers with any level of authenticated access can exploit this to modify theme settings, potentially leading to site compromise.
💻 Affected Systems
- Themify Ultra WordPress Theme
📦 What is this software?
Ultra by Themify
⚠️ Risk & Real-World Impact
Worst Case
An attacker with any authenticated access (even subscriber role) could modify critical theme settings, inject malicious code, redirect visitors to malicious sites, or gain administrative privileges leading to complete site takeover.
Likely Case
Attackers with low-privilege accounts (like subscribers or commenters) can modify theme settings to inject malicious scripts, deface the website, or redirect users to phishing pages.
If Mitigated
With proper access controls and theme hardening, impact is limited to unauthorized setting changes that can be detected and reverted without data loss.
🎯 Exploit Status
Exploitation requires authenticated access but any user role can exploit it. Public proof-of-concept exists showing how to modify theme settings.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 7.3.6 and later
Vendor Advisory: https://themify.me/changelogs/themify-ultra.txt
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Appearance > Themes. 3. Check if Themify Ultra is active. 4. Update theme to version 7.3.6 or later via WordPress updates or manual upload.
🔧 Temporary Workarounds
Restrict User Registration
allDisable new user registration to prevent attackers from creating accounts to exploit this vulnerability.
WordPress Settings > General > Membership: Uncheck 'Anyone can register'
Remove Vulnerable Theme
allTemporarily switch to default WordPress theme until patch is applied.
WordPress Admin > Appearance > Themes > Activate default theme (Twenty Twenty-Four, etc.)
🧯 If You Can't Patch
- Implement strict access controls and monitor user activity logs for unauthorized setting changes
- Use web application firewall (WAF) rules to block suspicious theme modification requests
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin > Appearance > Themes > Themify Ultra details for version number. If version is 7.3.5 or lower, system is vulnerable.Check Version:
WordPress: wp theme list --field=name,status,version | grep ultraVerify Fix Applied:
After update, verify theme version shows 7.3.6 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual theme setting modifications by non-admin users
- POST requests to /wp-admin/admin-ajax.php with action=themify_save_data from low-privilege users
Network Indicators:
- HTTP POST requests to theme-specific AJAX endpoints from unexpected user roles
SIEM Query:
source="wordpress.log" AND (uri_path="/wp-admin/admin-ajax.php" AND parameters.action="themify_save_data" AND user_role!="administrator")🔗 References
- https://patchstack.com/database/vulnerability/themify-ultra/wordpress-themify-ultra-theme-7-3-3-authenticated-arbitrary-settings-change-vulnerability?_s_id=cve
- https://patchstack.com/database/vulnerability/themify-ultra/wordpress-themify-ultra-theme-7-3-3-authenticated-arbitrary-settings-change-vulnerability?_s_id=cve
