CVE-2025-49438
📋 TL;DR
This CVE describes a PHP object injection vulnerability in the Simple Login Log WordPress plugin. Attackers can exploit insecure deserialization to execute arbitrary code on affected WordPress sites. All WordPress installations using Simple Login Log version 1.1.3 or earlier are vulnerable.
💻 Affected Systems
- Simple Login Log 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
Remote code execution leading to complete site compromise, data theft, malware installation, or website defacement.
Likely Case
Unauthenticated attackers achieving remote code execution to install backdoors, steal credentials, or pivot to other systems.
If Mitigated
Limited impact if proper web application firewalls block deserialization attacks and file integrity monitoring detects changes.
🎯 Exploit Status
Public exploit details exist on Patchstack and similar vulnerability databases. WordPress plugin vulnerabilities are frequently weaponized quickly.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.1.4 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Simple Login Log. 4. Click 'Update Now' if available. 5. If no update appears, manually download version 1.1.4+ from WordPress.org and replace files.
🔧 Temporary Workarounds
Disable Simple Login Log Plugin
allTemporarily disable the vulnerable plugin until patched.
wp plugin deactivate simple-login-log
Web Application Firewall Rule
allBlock deserialization attempts targeting the plugin.
# Configure WAF to block requests containing suspicious serialized objects to /wp-content/plugins/simple-login-log/
🧯 If You Can't Patch
- Remove the Simple Login Log plugin completely from all WordPress installations.
- Implement strict network segmentation to isolate WordPress servers and monitor all traffic to/from them.
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → Simple Login Log → Version. If version is 1.1.3 or earlier, you are vulnerable.Check Version:
wp plugin get simple-login-log --field=versionVerify Fix Applied:
Confirm Simple Login Log plugin version is 1.1.4 or later in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to plugin endpoints
- PHP errors related to unserialize()
- Unexpected file creation in wp-content/uploads
Network Indicators:
- HTTP requests containing serialized PHP objects (O:)
- Traffic to known exploit paths for this CVE
SIEM Query:
source="wordpress.log" AND ("simple-login-log" OR "unserialize") AND status=200