CVE-2025-58619
📋 TL;DR
This vulnerability allows attackers to inject malicious objects through deserialization of untrusted data in the Falang multilanguage WordPress plugin. Successful exploitation could lead to remote code execution or other malicious activities. All WordPress sites using affected versions of the Falang plugin are vulnerable.
💻 Affected Systems
- Falang multilanguage 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 system compromise, data theft, or website defacement.
Likely Case
Arbitrary code execution allowing attackers to install backdoors, steal sensitive data, or pivot to other systems.
If Mitigated
Limited impact if proper input validation and output encoding are implemented elsewhere in the application stack.
🎯 Exploit Status
Deserialization vulnerabilities are commonly exploited and weaponized quickly once details become public.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.3.66 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find Falang multilanguage plugin. 4. Click 'Update Now' if available. 5. Alternatively, download latest version from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable Falang Plugin
allTemporarily disable the vulnerable plugin until patched
wp plugin deactivate falang
Restrict Plugin Access
allUse web application firewall to block requests to Falang endpoints
🧯 If You Can't Patch
- Implement strict input validation and sanitization for all user inputs
- Deploy web application firewall with rules to detect and block deserialization attacks
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel → Plugins → Falang multilanguage → check version numberCheck Version:
wp plugin get falang --field=versionVerify Fix Applied:
Verify plugin version is 1.3.66 or higher after update📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to Falang plugin endpoints
- PHP errors related to unserialize() or object injection
Network Indicators:
- HTTP requests containing serialized PHP objects in parameters
- Traffic patterns to Falang-specific URLs
SIEM Query:
source="web_logs" AND (uri_path="/wp-content/plugins/falang/" OR user_agent CONTAINS "falang") AND (status_code=500 OR method="POST")