CVE-2025-59025
📋 TL;DR
This CVE describes a cross-site scripting (XSS) vulnerability in Open-Xchange AppSuite where malicious email content can execute script code in users' browsers. Attackers can perform actions within the victim's account context, potentially stealing sensitive information. Users of affected Open-Xchange AppSuite versions are vulnerable.
💻 Affected Systems
- Open-Xchange AppSuite
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete account takeover, exfiltration of all accessible data (emails, contacts, files), and lateral movement within the organization.
Likely Case
Session hijacking, theft of sensitive emails and contact information, and unauthorized actions performed in the user's name.
If Mitigated
Limited impact due to proper email filtering, script blocking, and least privilege access controls.
🎯 Exploit Status
Exploitation requires user interaction (opening/viewing malicious email) but no special privileges.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched versions
Vendor Advisory: https://documentation.open-xchange.com/appsuite/security/advisories/csaf/2025/oxas-adv-2025-0003.json
Restart Required: Yes
Instructions:
1. Review vendor advisory for affected versions
2. Apply the latest security update from Open-Xchange
3. Restart affected services
4. Verify fix implementation
🔧 Temporary Workarounds
Email Content Filtering
allImplement aggressive email filtering to block suspicious HTML/script content
Content Security Policy
allImplement strict CSP headers to limit script execution
🧯 If You Can't Patch
- Implement web application firewall with XSS protection rules
- Disable HTML email rendering for untrusted sources
- Educate users about email security risks
🔍 How to Verify
Check if Vulnerable:
Check AppSuite version against vendor advisory; test with controlled XSS payloads in email contentCheck Version:
Check AppSuite administration interface or consult deployment documentationVerify Fix Applied:
Verify updated version is installed; test that script tags in email content are properly sanitized📡 Detection & Monitoring
Log Indicators:
- Unusual email access patterns
- Script execution errors in web server logs
- Multiple failed script execution attempts
Network Indicators:
- Suspicious outbound connections following email access
- Unusual data exfiltration patterns
SIEM Query:
source="appsuite" AND (event="script_execution" OR event="email_processing_error")