CVE-2025-63498
📋 TL;DR
CVE-2025-63498 is a cross-site scripting (XSS) vulnerability in alinto SOGo 5.12.3 that allows attackers to inject malicious scripts via the 'userName' parameter. When exploited, this can lead to session hijacking, credential theft, or unauthorized actions in the context of the victim's session. This affects all SOGo deployments running version 5.12.3 or earlier.
💻 Affected Systems
- alinto SOGo
📦 What is this software?
Sogo by Alinto
⚠️ Risk & Real-World Impact
Worst Case
Attackers could steal administrator credentials, compromise user accounts, perform unauthorized actions as authenticated users, and potentially pivot to other systems.
Likely Case
Attackers steal user session cookies or credentials, leading to account compromise and unauthorized access to email/calendar data.
If Mitigated
Limited to session hijacking of users who interact with malicious content, with no privilege escalation beyond the victim's permissions.
🎯 Exploit Status
Exploitation requires user interaction (clicking a malicious link) but is technically simple once the payload is crafted.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: SOGo 5.12.4
Vendor Advisory: https://github.com/Alinto/sogo/releases/tag/SOGo-5.12.4
Restart Required: Yes
Instructions:
1. Backup current SOGo configuration and data. 2. Download SOGo 5.12.4 from official repository. 3. Stop SOGo service. 4. Install the new version. 5. Restart SOGo service. 6. Verify functionality.
🔧 Temporary Workarounds
Input Validation Filter
allImplement server-side input validation to sanitize the userName parameter
# Requires custom code modification to SOGo source
Content Security Policy
allImplement strict CSP headers to mitigate XSS impact
# Add to web server config: Content-Security-Policy: default-src 'self'
🧯 If You Can't Patch
- Implement WAF rules to block malicious userName parameter values
- Restrict access to SOGo interface to trusted networks only
🔍 How to Verify
Check if Vulnerable:
Check SOGo version: if version is 5.12.3 or earlier, system is vulnerableCheck Version:
sogo-tool version | grep 'SOGo'Verify Fix Applied:
Confirm SOGo version is 5.12.4 or later and test userName parameter with XSS payloads📡 Detection & Monitoring
Log Indicators:
- Unusual userName parameter values containing script tags or JavaScript code
- Multiple failed login attempts with suspicious userName values
Network Indicators:
- HTTP requests with userName parameter containing script tags or encoded payloads
SIEM Query:
web_requests userName=*script* OR userName=*javascript* OR userName=*onload*