CVE-2025-41036
📋 TL;DR
This vulnerability allows authenticated attackers to inject malicious scripts into appRain CMF admin profiles through specific input fields. When other administrators view these profiles, the scripts execute in their browser context. This affects all organizations using appRain CMF version 4.0.5 with admin accounts.
💻 Affected Systems
- appRain CMF
📦 What is this software?
Apprain by Apprain
⚠️ Risk & Real-World Impact
Worst Case
An attacker could steal admin session cookies, perform actions as other administrators, or redirect users to malicious sites, potentially leading to complete system compromise.
Likely Case
Attackers with admin access will inject scripts to steal credentials or session tokens from other administrators viewing the compromised profile.
If Mitigated
With proper input validation and output encoding, the scripts would be rendered harmless as text rather than executed.
🎯 Exploit Status
Exploitation requires admin-level authentication. Attackers need to modify admin profile fields with malicious payloads.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for patched version
Vendor Advisory: https://www.incibe.es/en/incibe-cert/notices/aviso/multiple-vulnerabilities-apprain-cmf
Restart Required: No
Instructions:
1. Check the vendor advisory for patched version. 2. Update appRain CMF to the patched version. 3. Verify the fix by testing the vulnerable parameters.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side input validation to sanitize the vulnerable parameters before processing.
Implement input sanitization for data[Admin][description], data[Admin][f_name], and data[Admin][l_name] parameters
🧯 If You Can't Patch
- Implement web application firewall (WAF) rules to block XSS payloads in the vulnerable parameters.
- Restrict admin account access to trusted users only and monitor for suspicious profile modifications.
🔍 How to Verify
Check if Vulnerable:
Test by submitting script payloads in the admin profile edit fields (description, first name, last name) and check if they execute when viewing the profile.Check Version:
Check appRain CMF version in admin panel or configuration files.Verify Fix Applied:
After patching, attempt the same XSS payloads and verify they are properly sanitized or blocked.📡 Detection & Monitoring
Log Indicators:
- Unusual modifications to admin profile fields containing script tags or JavaScript code
- Multiple failed login attempts followed by successful admin login
Network Indicators:
- HTTP POST requests to /apprain/admin/account/edit with script payloads in parameters
SIEM Query:
source="web_logs" AND uri="/apprain/admin/account/edit" AND (param="data[Admin][description]" OR param="data[Admin][f_name]" OR param="data[Admin][l_name]") AND payload CONTAINS "<script>"