CVE-2025-13784
📋 TL;DR
This is a cross-site scripting (XSS) vulnerability in the yungifez Skuul School Management System that allows attackers to inject malicious scripts into the SVG file handler component. The vulnerability affects systems up to version 2.6.5 and can be exploited remotely. School administrators and users accessing the affected dashboard are at risk.
💻 Affected Systems
- yungifez Skuul School Management System
📦 What is this software?
Skuul by Yungifez
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator session cookies, perform actions as authenticated users, deface the application, or redirect users to malicious sites.
Likely Case
Session hijacking leading to unauthorized access to school management data, or defacement of the application interface.
If Mitigated
Limited impact with proper input validation and output encoding in place, potentially only affecting the specific vulnerable component.
🎯 Exploit Status
Exploit details are publicly available in GitHub gists, requiring some authentication to reach the vulnerable endpoint
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Consider upgrading to any version above 2.6.5 if released by vendor, or implement workarounds.
🔧 Temporary Workarounds
Input Validation for SVG Files
allImplement server-side validation to sanitize SVG file content before processing
Content Security Policy
allImplement CSP headers to restrict script execution from untrusted sources
Content-Security-Policy: default-src 'self'; script-src 'self'
🧯 If You Can't Patch
- Restrict access to the /dashboard/schools/1/edit endpoint using network controls or WAF rules
- Implement output encoding for all user-controlled data rendered in the SVG handler
🔍 How to Verify
Check if Vulnerable:
Check if system version is 2.6.5 or earlier and test SVG file upload with script payloads at the vulnerable endpointCheck Version:
Check application version in admin panel or configuration filesVerify Fix Applied:
Test SVG file upload with XSS payloads and verify scripts are not executed📡 Detection & Monitoring
Log Indicators:
- Unusual SVG file uploads
- Requests to /dashboard/schools/1/edit with script-like content
- Multiple failed authentication attempts followed by SVG uploads
Network Indicators:
- HTTP POST requests to vulnerable endpoint with SVG content containing script tags
- Unusual outbound connections from the application server
SIEM Query:
source="web_server" AND (uri="/dashboard/schools/1/edit" AND method="POST" AND content_type="image/svg+xml")