CVE-2023-38477
📋 TL;DR
This CVE describes a missing authorization vulnerability in the QR code MeCard/vCard generator WordPress plugin that allows unauthorized users to access functionality intended for administrators. The vulnerability affects all versions up to 1.6.0, potentially allowing attackers to modify QR code settings or access administrative features without proper authentication.
💻 Affected Systems
- QR code MeCard/vCard generator WordPress plugin
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
An attacker could gain administrative privileges on the WordPress site, modify QR code generation settings, inject malicious content into generated QR codes, or potentially chain with other vulnerabilities for further compromise.
Likely Case
Unauthorized users can access administrative plugin settings, modify QR code configurations, or potentially access sensitive functionality intended only for authenticated administrators.
If Mitigated
With proper access controls and authentication requirements, the vulnerability would be prevented, limiting access to authorized administrators only.
🎯 Exploit Status
The vulnerability is publicly documented with proof-of-concept available. Exploitation requires minimal technical skill as it involves accessing specific endpoints without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.6.1 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'QR code MeCard/vCard generator'. 4. Click 'Update Now' if update available. 5. Alternatively, download version 1.6.1+ from WordPress repository and replace plugin files.
🔧 Temporary Workarounds
Disable vulnerable plugin
allTemporarily disable the plugin until patched
wp plugin deactivate wp-qrcode-me-v-card
Restrict plugin endpoint access
linuxUse web application firewall or .htaccess to block unauthorized access to plugin endpoints
# Add to .htaccess: RewriteRule ^wp-content/plugins/wp-qrcode-me-v-card/.*$ - [F,L]
🧯 If You Can't Patch
- Implement strict network access controls to limit who can access the WordPress admin interface
- Enable WordPress security plugins that monitor for unauthorized access attempts and block suspicious IPs
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for 'QR code MeCard/vCard generator' version. If version is 1.6.0 or lower, system is vulnerable.Check Version:
wp plugin get wp-qrcode-me-v-card --field=versionVerify Fix Applied:
Verify plugin version is 1.6.1 or higher in WordPress admin panel. Test accessing plugin admin endpoints without authentication to confirm access is properly restricted.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to /wp-admin/admin.php?page=wp-qrcode-me-v-card or similar plugin admin endpoints
- 403/401 errors followed by successful 200 responses to admin endpoints from unauthenticated users
Network Indicators:
- HTTP requests to plugin admin endpoints without authentication cookies or tokens
- Unusual traffic patterns to plugin-specific URLs from external IPs
SIEM Query:
source="wordpress.log" AND (uri_path="/wp-admin/admin.php" AND query_string="*page=wp-qrcode-me-v-card*") AND NOT (user_agent="*wp-admin*" OR cookie="*wordpress_logged_in*")