CVE-2026-28562
📋 TL;DR
CVE-2026-28562 is an unauthenticated SQL injection vulnerability in wpForo WordPress plugin versions 2.4.14 and earlier. Attackers can exploit the wpfob parameter to extract sensitive data like WordPress credentials from the database without authentication. All WordPress sites running vulnerable wpForo versions are affected.
💻 Affected Systems
- wpForo WordPress Plugin
📦 What is this software?
Wpforo Forum by Gvectors
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to credential theft, privilege escalation, and potential site takeover.
Likely Case
Extraction of WordPress user credentials and sensitive forum data through blind SQL injection.
If Mitigated
Limited data exposure if database permissions are restricted and monitoring detects injection attempts.
🎯 Exploit Status
Exploitation requires sending crafted requests to the vulnerable endpoint with SQL injection payloads in the wpfob parameter.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2.4.15 or later
Vendor Advisory: https://wordpress.org/plugins/wpforo/#developers
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find wpForo and click 'Update Now'. 4. Verify wpForo version is 2.4.15 or higher.
🔧 Temporary Workarounds
Disable wpForo Plugin
allTemporarily disable the vulnerable plugin until patched.
wp plugin deactivate wpforo
Web Application Firewall Rule
allBlock requests containing SQL injection patterns in wpfob parameter.
ModSecurity rule: SecRule ARGS:wpfob "(?i:(union|select|from|where|case|when|then|else|end))" "id:1001,phase:2,deny,status:403,msg:'SQLi attempt in wpfob parameter'"
🧯 If You Can't Patch
- Implement strict WAF rules to block SQL injection patterns in all request parameters.
- Restrict database user permissions to read-only for wpForo operations.
🔍 How to Verify
Check if Vulnerable:
Check wpForo version in WordPress admin panel under Plugins > Installed Plugins. If version is 2.4.14 or earlier, system is vulnerable.Check Version:
wp plugin list --name=wpforo --field=versionVerify Fix Applied:
Verify wpForo version is 2.4.15 or higher in WordPress admin panel. Test that wpfob parameter no longer accepts SQL injection payloads.📡 Detection & Monitoring
Log Indicators:
- HTTP requests with wpfob parameter containing SQL keywords (UNION, SELECT, CASE, WHEN)
- Unusual database queries from WordPress process
- Multiple failed login attempts following SQL injection patterns
Network Indicators:
- HTTP POST/GET requests to wpforo endpoints with suspicious wpfob parameter values
- Unusual outbound database connections from web server
SIEM Query:
source="web_logs" AND (uri_path="*wpforo*" AND query_string="*wpfob=*CASE*" OR query_string="*wpfob=*SELECT*")