CVE-2025-53990
📋 TL;DR
This vulnerability allows attackers to inject malicious objects through untrusted data deserialization in JetFormBuilder WordPress plugin. Attackers could execute arbitrary code on affected WordPress sites. All WordPress installations using JetFormBuilder versions up to 3.5.1.2 are affected.
💻 Affected Systems
- JetFormBuilder 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, and server takeover.
Likely Case
Arbitrary code execution allowing backdoor installation, data exfiltration, or site defacement.
If Mitigated
Limited impact if proper input validation and WAF rules block malicious payloads.
🎯 Exploit Status
Public exploit details available on Patchstack; deserialization vulnerabilities are commonly weaponized.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.5.1.3 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins → Installed Plugins. 3. Find JetFormBuilder and click 'Update Now'. 4. Verify version is 3.5.1.3 or higher.
🔧 Temporary Workarounds
Disable JetFormBuilder Plugin
allTemporarily disable the vulnerable plugin until patched.
wp plugin deactivate jetformbuilder
WAF Rule for Deserialization
allAdd web application firewall rules to block PHP object injection payloads.
🧯 If You Can't Patch
- Implement strict input validation on all form submissions
- Deploy web application firewall with deserialization attack detection
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin → Plugins → JetFormBuilder version. If version is 3.5.1.2 or lower, you are vulnerable.Check Version:
wp plugin get jetformbuilder --field=versionVerify Fix Applied:
Verify JetFormBuilder version is 3.5.1.3 or higher in WordPress admin panel.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to JetFormBuilder endpoints
- PHP error logs containing unserialize() errors
- Web server logs with base64 encoded payloads
Network Indicators:
- HTTP POST requests containing serialized PHP objects
- Requests with unusual Content-Type headers
SIEM Query:
source="web_logs" AND (uri="*jetformbuilder*" OR uri="*jfb*" OR user_agent="*jetformbuilder*") AND (method="POST" AND size>1000)