CVE-2023-33924
📋 TL;DR
This SQL injection vulnerability in the Felix Welberg SIS Handball WordPress plugin allows attackers to execute arbitrary SQL commands on the database. It affects all WordPress sites using this plugin from version n/a through 1.0.45. Attackers can potentially access, modify, or delete sensitive data.
💻 Affected Systems
- Felix Welberg SIS Handball WordPress Plugin
📦 What is this software?
Sis Handball by Felixwelberg
⚠️ Risk & Real-World Impact
Worst Case
Complete database compromise leading to data theft, data destruction, privilege escalation, and full system takeover via subsequent attacks.
Likely Case
Unauthorized data access including user credentials, personal information, and potentially administrative access to the WordPress site.
If Mitigated
Limited impact with proper input validation, parameterized queries, and database user privilege restrictions in place.
🎯 Exploit Status
SQL injection vulnerabilities are commonly exploited and automated tools exist for detection and exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.46 or later
Vendor Advisory: https://patchstack.com/database/vulnerability/sis-handball/wordpress-sis-handball-plugin-1-0-45-sql-injection-vulnerability
Restart Required: No
Instructions:
1. Log into WordPress admin panel. 2. Navigate to Plugins > Installed Plugins. 3. Find 'SIS Handball' plugin. 4. Click 'Update Now' if update available. 5. If no update available, deactivate and delete plugin, then install fresh version from WordPress repository.
🔧 Temporary Workarounds
Temporary Plugin Deactivation
allDisable the vulnerable plugin until patched version is available
wp plugin deactivate sis-handball
Web Application Firewall Rules
allImplement WAF rules to block SQL injection patterns targeting this plugin
🧯 If You Can't Patch
- Deactivate and remove the SIS Handball plugin immediately
- Implement strict network segmentation and limit database user privileges to minimum required
🔍 How to Verify
Check if Vulnerable:
Check WordPress admin panel > Plugins > Installed Plugins for SIS Handball versionCheck Version:
wp plugin list --name=sis-handball --field=versionVerify Fix Applied:
Verify plugin version is 1.0.46 or higher in WordPress admin panel📡 Detection & Monitoring
Log Indicators:
- Unusual database queries in WordPress or database logs
- Multiple failed login attempts or SQL errors in plugin-related requests
Network Indicators:
- HTTP requests with SQL injection payloads targeting SIS Handball endpoints
- Unusual outbound database connections
SIEM Query:
source="wordpress.log" AND "sis-handball" AND ("SQL" OR "database error" OR "UNION SELECT")