CVE-2023-41664
📋 TL;DR
This CVE describes a missing authorization vulnerability in the Easy Newsletter Signups WordPress plugin that allows attackers to bypass access controls. Attackers could exploit incorrectly configured security levels to perform unauthorized actions. All WordPress sites using Easy Newsletter Signups versions up to 1.0.4 are affected.
💻 Affected Systems
- Easy Newsletter Signups 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
Attackers could gain administrative privileges, modify plugin settings, access subscriber data, or potentially execute arbitrary code depending on plugin functionality.
Likely Case
Unauthorized access to newsletter management functions, subscriber data exposure, or manipulation of signup forms and settings.
If Mitigated
Proper access controls would prevent unauthorized users from accessing administrative functions, limiting impact to authorized users only.
🎯 Exploit Status
Exploitation requires some level of access but authorization bypass vulnerabilities are commonly weaponized in WordPress environments.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.5 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Easy Newsletter Signups. 4. Click 'Update Now' if available. 5. Alternatively, download version 1.0.5+ from WordPress repository and replace plugin files.
🔧 Temporary Workarounds
Disable Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate easy-newsletter-signups
Restrict Access
allUse web application firewall rules to restrict access to plugin admin pages
🧯 If You Can't Patch
- Remove the Easy Newsletter Signups plugin completely
- Implement strict network segmentation and firewall rules to limit access to WordPress admin interface
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Easy Newsletter Signups → Version. If version is 1.0.4 or earlier, you are vulnerable.Check Version:
wp plugin get easy-newsletter-signups --field=versionVerify Fix Applied:
After update, verify version shows 1.0.5 or later in WordPress plugins list.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to /wp-admin/admin.php?page=easy-newsletter-signups
- Multiple failed authentication attempts followed by successful access to plugin admin pages
Network Indicators:
- Unusual traffic patterns to WordPress admin endpoints from unexpected IP addresses
SIEM Query:
source="wordpress.log" AND (uri="/wp-admin/admin.php?page=easy-newsletter-signups" OR plugin="easy-newsletter-signups") AND (user="unauthenticated" OR user="low-privilege-user")