CVE-2025-30191
📋 TL;DR
This CVE describes a redressing attack vulnerability where malicious email content can trick users into performing unintended actions or disclosing sensitive information to third parties. The vulnerability affects systems that process HTML fragments in email attributes without proper sanitization. Users of affected email or collaboration systems are at risk.
💻 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
Attackers could steal sensitive user credentials, financial information, or perform unauthorized actions on behalf of users, leading to data breaches or account compromise.
Likely Case
Users could be tricked into clicking malicious links or providing limited personal information, potentially enabling phishing campaigns or social engineering attacks.
If Mitigated
With proper email filtering and user awareness training, impact would be limited to isolated incidents with minimal data exposure.
🎯 Exploit Status
No publicly available exploits known, but redressing attacks typically require user interaction
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version with updated sanitization procedure
Vendor Advisory: https://documentation.open-xchange.com/appsuite/security/advisories/csaf/2025/oxas-adv-2025-0002.json
Restart Required: No
Instructions:
1. Review vendor advisory 2. Apply latest security patches 3. Update to version with fixed sanitization procedure 4. Verify HTML fragment handling is properly restricted
🔧 Temporary Workarounds
Enhanced Email Filtering
allImplement additional email filtering to block HTML fragments in suspicious attributes
User Awareness Training
allTrain users to recognize and report suspicious emails with unusual content
🧯 If You Can't Patch
- Implement strict email content filtering at gateway level
- Disable HTML rendering in email client for untrusted sources
🔍 How to Verify
Check if Vulnerable:
Check if system processes HTML fragments in email attributes without the updated sanitization procedureCheck Version:
Check Open-Xchange AppSuite version against patched releases in vendor advisoryVerify Fix Applied:
Verify that attribute values containing HTML fragments are now properly denied by sanitization📡 Detection & Monitoring
Log Indicators:
- Unusual email processing patterns
- Multiple failed sanitization attempts
- User reports of suspicious emails
Network Indicators:
- Unusual email traffic patterns
- Suspicious HTML content in email headers
SIEM Query:
Search for email processing errors or sanitization failures in application logs