CVE-2025-67999
📋 TL;DR
This SQL injection vulnerability in the Stefano Lissa Newsletter WordPress plugin allows attackers to execute arbitrary SQL commands through blind injection techniques. It affects all WordPress sites running Newsletter plugin versions up to and including 9.0.9, potentially exposing database contents.
💻 Affected Systems
- Stefano Lissa Newsletter 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
Complete database compromise including user credentials, sensitive data extraction, and potential privilege escalation to full system access.
Likely Case
Data exfiltration of newsletter subscriber information, user data, and potential site defacement or content manipulation.
If Mitigated
Limited impact with proper input validation and database permission restrictions in place.
🎯 Exploit Status
Blind SQL injection typically requires more effort than standard SQLi but tools exist to automate exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version after 9.0.9
Vendor Advisory: https://patchstack.com/database/Wordpress/Plugin/newsletter/vulnerability/wordpress-newsletter-plugin-9-0-9-sql-injection-vulnerability?_s_id=cve
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find Newsletter plugin. 4. Click 'Update Now' if available. 5. If no update available, deactivate and remove plugin immediately.
🔧 Temporary Workarounds
WAF Rule Implementation
allDeploy web application firewall rules to block SQL injection patterns targeting Newsletter plugin endpoints.
Plugin Deactivation
linuxTemporarily disable Newsletter plugin until patched version is available.
wp plugin deactivate newsletter
🧯 If You Can't Patch
- Implement strict input validation and parameterized queries at application layer
- Restrict database user permissions to minimum required operations
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Newsletter plugin version number.Check Version:
wp plugin get newsletter --field=versionVerify Fix Applied:
Verify plugin version is greater than 9.0.9 and test vulnerable endpoints with SQL injection payloads.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL error messages in WordPress logs
- Multiple failed login attempts or SQL syntax in request logs
Network Indicators:
- SQL injection patterns in HTTP requests to newsletter endpoints
- Unusual database query patterns from web server
SIEM Query:
source="wordpress.log" AND "newsletter" AND ("sql" OR "syntax" OR "union" OR "select")