CVE-2025-9568
📋 TL;DR
Sunnet eHRD software contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to execute arbitrary JavaScript in users' browsers through phishing links. This affects organizations using the vulnerable eHRD software, potentially compromising user sessions and data.
💻 Affected Systems
- Sunnet eHRD
📦 What is this software?
Ehrd Ctms by Sun.net
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, redirect users to malicious sites, perform actions on behalf of authenticated users, or install malware through drive-by downloads.
Likely Case
Session hijacking, credential theft, and phishing redirection attacks against employees accessing the eHRD system.
If Mitigated
Limited impact if proper input validation and output encoding are implemented, though phishing attempts may still succeed.
🎯 Exploit Status
Exploitation requires user interaction via phishing but uses simple reflected XSS techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in references; contact vendor for patched version
Vendor Advisory: https://www.twcert.org.tw/en/cp-139-10357-7de41-2.html
Restart Required: No
Instructions:
1. Contact Sunnet for security patches. 2. Apply patches to all eHRD instances. 3. Test functionality after patching.
🔧 Temporary Workarounds
Input Validation and Output Encoding
allImplement server-side input validation and proper output encoding for all user-supplied data
Content Security Policy
webImplement strict Content Security Policy headers to mitigate XSS impact
Content-Security-Policy: default-src 'self'; script-src 'self'
🧯 If You Can't Patch
- Implement web application firewall with XSS protection rules
- Disable vulnerable endpoints or restrict access to trusted networks only
🔍 How to Verify
Check if Vulnerable:
Test for XSS by injecting script payloads into URL parameters and form inputs, checking if they executeCheck Version:
Check eHRD admin interface or configuration files for version informationVerify Fix Applied:
Retest XSS payloads after patching to confirm they are properly sanitized and don't execute📡 Detection & Monitoring
Log Indicators:
- Unusual URL parameters containing script tags or JavaScript code
- Multiple failed login attempts followed by suspicious redirects
Network Indicators:
- HTTP requests with suspicious parameters containing script payloads
- Outbound connections to unknown domains following eHRD access
SIEM Query:
source="eHRD" AND (url="*<script>*" OR url="*javascript:*")