CVE-2025-47635
📋 TL;DR
This Server-Side Request Forgery (SSRF) vulnerability in WPWebinarSystem WebinarPress allows attackers to make unauthorized requests from the vulnerable server to internal or external systems. It affects WordPress sites running WebinarPress plugin versions up to 1.33.27. Attackers could potentially access internal services or perform port scanning through the vulnerable server.
💻 Affected Systems
- WPWebinarSystem WebinarPress
📦 What is this software?
Webinarpress by Webinarpress
⚠️ Risk & Real-World Impact
Worst Case
Attacker accesses internal services, exfiltrates sensitive data, or performs port scanning to map internal network infrastructure.
Likely Case
Attacker accesses internal services or performs limited port scanning, potentially exposing internal network information.
If Mitigated
Limited impact due to network segmentation, firewall rules, or lack of internal services to target.
🎯 Exploit Status
SSRF vulnerabilities typically have low exploitation complexity once the vulnerable endpoint is identified.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.33.28 or later
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find WebinarPress plugin. 4. Click 'Update Now' if update available. 5. Alternatively, download latest version from WordPress repository and manually update.
🔧 Temporary Workarounds
Disable WebinarPress Plugin
allTemporarily disable the vulnerable plugin until patched.
wp plugin deactivate wp-webinarsystem
Network Segmentation
allRestrict outbound HTTP/HTTPS requests from web server to only necessary external services.
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block SSRF patterns
- Restrict outbound network access from web servers using firewall rules
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for WebinarPress version.Check Version:
wp plugin get wp-webinarsystem --field=versionVerify Fix Applied:
Verify WebinarPress plugin version is 1.33.28 or higher in WordPress admin.📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTP requests from web server to internal IPs
- Requests to localhost or internal services from web application
Network Indicators:
- HTTP requests from web server to unexpected internal destinations
- Port scanning patterns originating from web server
SIEM Query:
source="web_server_logs" AND (dest_ip=10.0.0.0/8 OR dest_ip=172.16.0.0/12 OR dest_ip=192.168.0.0/16 OR dest_ip=127.0.0.1) AND uri CONTAINS "webinarpress"