CVE-2025-55171
📋 TL;DR
CVE-2025-55171 is an authentication bypass vulnerability in WeGIA web management software that allows unauthenticated attackers to delete arbitrary image files. This affects all WeGIA installations prior to version 3.4.8. Charitable institutions and other organizations using WeGIA for web management are vulnerable.
💻 Affected Systems
- WeGIA
📦 What is this software?
Wegia by Wegia
⚠️ Risk & Real-World Impact
Worst Case
Attackers could delete critical system images, deface websites, disrupt operations, or delete configuration images needed for proper application functionality.
Likely Case
Website defacement through image deletion, disruption of user interfaces, and potential data loss of uploaded content images.
If Mitigated
Minimal impact with proper access controls, though the vulnerability still represents a security weakness.
🎯 Exploit Status
Exploitation requires only HTTP POST requests to the vulnerable endpoint with minimal parameters.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.4.8
Vendor Advisory: https://github.com/LabRedesCefetRJ/WeGIA/security/advisories/GHSA-8rm5-3jvx-hcxv
Restart Required: No
Instructions:
1. Backup current installation and database. 2. Download WeGIA version 3.4.8 from official repository. 3. Replace vulnerable files with patched version. 4. Verify authentication checks are present in /html/personalizacao_remover.php.
🔧 Temporary Workarounds
Web Server Access Restriction
allBlock unauthenticated access to vulnerable endpoint using web server configuration
# Apache: Add to .htaccess or virtual host config
<Location "/html/personalizacao_remover.php">
Require valid-user
</Location>
# Nginx: Add to server block
location = /html/personalizacao_remover.php {
auth_basic "Restricted";
auth_basic_user_file /path/to/.htpasswd;
}
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block unauthenticated POST requests to /html/personalizacao_remover.php
- Restrict network access to WeGIA administration interface to trusted IP addresses only
🔍 How to Verify
Check if Vulnerable:
Attempt unauthenticated POST request to /html/personalizacao_remover.php with parameter imagem_0=test. If request succeeds without authentication, system is vulnerable.Check Version:
Check WeGIA version in admin panel or examine version files in installation directoryVerify Fix Applied:
Check that /html/personalizacao_remover.php contains authentication checks and session validation. Attempt same unauthenticated request - should return authentication error.📡 Detection & Monitoring
Log Indicators:
- Unusual POST requests to /html/personalizacao_remover.php from unauthenticated users
- Multiple 200 OK responses to personalizacao_remover.php without preceding login events
Network Indicators:
- HTTP POST requests to /html/personalizacao_remover.php without authentication headers or cookies
SIEM Query:
source="web_server" AND uri="/html/personalizacao_remover.php" AND method="POST" AND NOT (user_agent="*bot*" OR user_agent="*crawler*")