CVE-2025-1105
📋 TL;DR
This vulnerability allows attackers to inject malicious scripts into SiberianCMS 4.20.6 through the /app/sae/design/desktop/flat endpoint via HTTP GET requests. The cross-site scripting (XSS) attack can be executed remotely, potentially affecting any user accessing the compromised CMS interface. SiberianCMS administrators and users are primarily at risk.
💻 Affected Systems
- SiberianCMS
📦 What is this software?
Siberiancms by Siberiancms
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal session cookies, redirect users to malicious sites, or perform actions on behalf of authenticated users, potentially leading to account compromise or data theft.
Likely Case
Attackers inject malicious scripts that execute in users' browsers, potentially stealing session tokens or displaying phishing content to users accessing the vulnerable page.
If Mitigated
With proper input validation and output encoding, the malicious scripts would be neutralized, preventing execution in user browsers.
🎯 Exploit Status
Exploit has been publicly disclosed and may be used. Attack can be launched remotely without authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None provided
Restart Required: No
Instructions:
No official patch available. Vendor did not respond to disclosure. Consider upgrading to a newer version if available or implementing workarounds.
🔧 Temporary Workarounds
Input Validation and Output Encoding
allImplement server-side validation and proper output encoding for all user inputs, especially in the affected endpoint.
Web Application Firewall (WAF) Rules
allDeploy WAF rules to block XSS payloads targeting the /app/sae/design/desktop/flat endpoint.
🧯 If You Can't Patch
- Restrict access to the SiberianCMS admin interface to trusted IP addresses only.
- Implement Content Security Policy (CSP) headers to mitigate XSS impact.
🔍 How to Verify
Check if Vulnerable:
Test the /app/sae/design/desktop/flat endpoint with XSS payloads (e.g., <script>alert('test')</script>) to see if scripts execute.Check Version:
Check SiberianCMS version in admin panel or configuration files.Verify Fix Applied:
After implementing workarounds, retest with XSS payloads to ensure scripts are properly sanitized or blocked.📡 Detection & Monitoring
Log Indicators:
- HTTP GET requests to /app/sae/design/desktop/flat containing script tags or suspicious parameters
- Unusual user-agent strings or repeated access attempts to the vulnerable endpoint
Network Indicators:
- Inbound traffic with XSS payloads targeting the specific endpoint
- Outbound connections to suspicious domains following access to the vulnerable page
SIEM Query:
source="web_logs" AND uri="/app/sae/design/desktop/flat" AND (query CONTAINS "<script>" OR query CONTAINS "javascript:")