CVE-2025-11833
📋 TL;DR
This vulnerability allows unauthenticated attackers to read arbitrary email logs stored by the Post SMTP WordPress plugin, including sensitive emails like password reset messages. This affects all WordPress sites using Post SMTP plugin versions up to 3.6.0, potentially leading to account takeover attacks.
💻 Affected Systems
- Post SMTP – Complete SMTP Solution with Logs, Alerts, Backup SMTP & Mobile App 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 gain administrative access to WordPress sites by intercepting password reset links, leading to complete site compromise, data theft, and further malware deployment.
Likely Case
Attackers harvest password reset links to compromise user accounts, potentially accessing sensitive data or performing unauthorized actions.
If Mitigated
With proper access controls and monitoring, impact is limited to exposure of email content without successful account takeover.
🎯 Exploit Status
Exploitation requires simple HTTP requests to vulnerable endpoints without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.6.1
Vendor Advisory: https://plugins.trac.wordpress.org/changeset/3386160/post-smtp
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Post SMTP plugin. 4. Click 'Update Now' if available. 5. Alternatively, download version 3.6.1+ from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable Post SMTP Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate post-smtp
Disable Email Logging
allTurn off email logging feature in plugin settings
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block access to Post SMTP email log endpoints
- Restrict access to WordPress admin area using IP whitelisting or additional authentication
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Installed Plugins for Post SMTP version. If version is 3.6.0 or lower, site is vulnerable.Check Version:
wp plugin get post-smtp --field=versionVerify Fix Applied:
Verify Post SMTP plugin version is 3.6.1 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual access to /wp-admin/admin-ajax.php with action=post_smtp_fetch_logs
- Multiple failed authentication attempts followed by email log access
Network Indicators:
- HTTP requests to WordPress admin endpoints without authentication cookies
- Patterns of requests to Post SMTP-specific API endpoints
SIEM Query:
source="web_logs" AND (uri_path="/wp-admin/admin-ajax.php" AND query_string="action=post_smtp_fetch_logs")