CVE-2023-0820
📋 TL;DR
This CSRF vulnerability in the User Role WordPress plugin allows attackers to escalate privileges for any user role without authentication. Attackers can trick authenticated administrators into performing unintended actions, potentially granting attackers administrative access. All WordPress sites using vulnerable versions of this plugin are affected.
💻 Affected Systems
- User Role by BestWebSoft WordPress Plugin
📦 What is this software?
User Role by Bestwebsoft
⚠️ Risk & Real-World Impact
Worst Case
Complete site takeover where attackers gain administrative privileges, install backdoors, steal data, or deface the website.
Likely Case
Attackers gain elevated privileges to modify content, create new admin accounts, or install malicious plugins/themes.
If Mitigated
With proper CSRF protections and user awareness, exploitation requires social engineering and may be detected before damage occurs.
🎯 Exploit Status
Exploitation requires tricking an authenticated administrator into clicking a malicious link or visiting a compromised page.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.7
Vendor Advisory: https://wordpress.org/plugins/user-role/#developers
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'User Role' plugin. 4. Click 'Update Now' if available. 5. Alternatively, download version 1.6.7+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the vulnerable plugin until patching is possible
wp plugin deactivate user-role
Implement CSRF Protection
allAdd WordPress nonce verification to role capability update requests
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block CSRF attacks targeting role capability updates
- Educate administrators about phishing risks and implement strict access controls for admin accounts
🔍 How to Verify
Check if Vulnerable:
Check plugin version in WordPress admin under Plugins > Installed Plugins. If version is below 1.6.7, you are vulnerable.Check Version:
wp plugin get user-role --field=versionVerify Fix Applied:
Confirm plugin version is 1.6.7 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual role capability modifications
- Multiple failed CSRF token validations
- Administrative actions from unexpected IP addresses
Network Indicators:
- POST requests to /wp-admin/admin-ajax.php with role update parameters without proper referrer headers
SIEM Query:
source="wordpress.log" AND ("action=update_role_capabilities" OR "user_role_plugin") AND status!=200