CVE-2025-8386
📋 TL;DR
This vulnerability allows authenticated users with 'aaConfigTools' privileges to inject malicious scripts into App Objects' help files during configuration operations in the Application Server IDE. If exploited, it enables cross-site scripting attacks that could lead to privilege escalation. Only systems using the affected IDE component during config-time operations are vulnerable.
💻 Affected Systems
- AVEVA Application Server
⚠️ 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
An attacker with aaConfigTools privileges could inject persistent XSS payloads that execute when other users view help files, potentially allowing full system compromise through privilege escalation.
Likely Case
Authenticated malicious insider or compromised account with aaConfigTools access injects XSS to steal session tokens or credentials from other users, leading to horizontal privilege escalation.
If Mitigated
With proper access controls and input validation, the attack surface is limited to authorized users only, reducing impact to isolated privilege boundary violations.
🎯 Exploit Status
Requires authenticated access with specific privileges and knowledge of IDE configuration operations. No public exploit code identified in references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Consult AVEVA Security Bulletin AVEVA-2025-005 for specific patched versions
Vendor Advisory: https://www.aveva.com/content/dam/aveva/documents/support/cyber-security-updates/SecurityBulletin-AVEVA-2025-005.pdf
Restart Required: Yes
Instructions:
1. Review AVEVA Security Bulletin AVEVA-2025-005
2. Download appropriate patch from AVEVA support portal
3. Apply patch following vendor instructions
4. Restart Application Server services
5. Verify patch application
🔧 Temporary Workarounds
Restrict aaConfigTools Privileges
allLimit access to aaConfigTools privilege to only essential personnel
Configure via Application Server administration console or security settings
Input Validation Enhancement
allImplement additional input validation for help file content during configuration operations
Custom validation rules in IDE configuration settings
🧯 If You Can't Patch
- Implement strict access controls to limit aaConfigTools privileges to minimal necessary users
- Monitor and audit configuration changes to help files for suspicious modifications
🔍 How to Verify
Check if Vulnerable:
Check if system uses affected AVEVA Application Server versions and has users with aaConfigTools privilegesCheck Version:
Check Application Server version via administration console or system information toolsVerify Fix Applied:
Verify patch version matches or exceeds recommended version in AVEVA Security Bulletin AVEVA-2025-005📡 Detection & Monitoring
Log Indicators:
- Unusual modifications to help files during config-time operations
- Multiple failed privilege escalation attempts following help file access
Network Indicators:
- Suspicious outbound connections from Application Server following help file access
SIEM Query:
source="application_server" AND (event="help_file_modification" OR event="config_change") AND user_privilege="aaConfigTools"