CVE-2025-63243
📋 TL;DR
This reflected XSS vulnerability in Pixeon WebLaudos allows attackers to execute arbitrary JavaScript in victims' browsers by tricking them into clicking a malicious URL. It affects users of the password change functionality, potentially leading to session hijacking or unauthorized actions. Only Pixeon WebLaudos 25.1 (01) installations are impacted.
💻 Affected Systems
- Pixeon WebLaudos
📦 What is this software?
Weblaudos by Pixeon
⚠️ Risk & Real-World Impact
Worst Case
Attackers steal administrator session cookies, gain full application access, exfiltrate sensitive patient data, and perform unauthorized administrative actions.
Likely Case
Attackers steal user session cookies to impersonate victims, perform unauthorized actions within their privilege level, or conduct phishing attacks.
If Mitigated
With proper input validation and output encoding, the vulnerability is eliminated; with WAF protection, most exploitation attempts are blocked.
🎯 Exploit Status
Exploitation requires crafting a malicious URL and social engineering victims to click it. No authentication needed to trigger the vulnerable endpoint.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://www.pixeon.com/
Restart Required: No
Instructions:
1. Contact Pixeon for patch availability. 2. If patch exists, download from vendor portal. 3. Apply patch following vendor instructions. 4. Test functionality.
🔧 Temporary Workarounds
WAF Rule Implementation
allDeploy web application firewall rules to block XSS payloads targeting the sle_sSenha parameter.
# Example ModSecurity rule: SecRule ARGS:sle_sSenha "@detectXSS" "id:1001,phase:2,deny,status:403"
Input Validation Filter
windowsImplement server-side input validation to sanitize the sle_sSenha parameter before processing.
# ASP example: sle_sSenha = Server.HTMLEncode(Request.Form("sle_sSenha"))
🧯 If You Can't Patch
- Implement strict Content Security Policy (CSP) headers to prevent script execution from untrusted sources.
- Deploy network segmentation to restrict access to the vulnerable application from untrusted networks.
🔍 How to Verify
Check if Vulnerable:
Test by accessing loginAlterarSenha.asp with a test XSS payload in the sle_sSenha parameter (e.g., ?sle_sSenha=<script>alert(1)</script>) and check if script executes.Check Version:
Check application interface or configuration files for version information; typically visible in login page footer or admin panel.Verify Fix Applied:
Retest with the same XSS payload; successful fix should show encoded output or block the request entirely.📡 Detection & Monitoring
Log Indicators:
- HTTP requests to loginAlterarSenha.asp containing script tags or JavaScript in sle_sSenha parameter
- Unusual access patterns to password change functionality
Network Indicators:
- HTTP traffic with XSS patterns in query strings directed at the vulnerable endpoint
SIEM Query:
source="web_logs" AND uri="*loginAlterarSenha.asp*" AND (query="*<script>*" OR query="*javascript:*")