CVE-2025-30327
📋 TL;DR
An integer overflow vulnerability in Adobe InCopy allows arbitrary code execution when a user opens a malicious file. This affects users of InCopy versions 20.2, 19.5.3 and earlier. Attackers can exploit this to run code with the victim's privileges.
💻 Affected Systems
- Adobe InCopy
📦 What is this software?
Incopy by Adobe
Incopy by Adobe
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise through arbitrary code execution leading to data theft, ransomware deployment, or persistent backdoor installation.
Likely Case
Malicious document leads to malware installation, credential theft, or lateral movement within the network.
If Mitigated
Limited impact with proper application sandboxing, least privilege, and file validation controls in place.
🎯 Exploit Status
Exploitation requires user interaction (opening malicious file). No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Update to InCopy 20.3 or later
Vendor Advisory: https://helpx.adobe.com/security/products/incopy/apsb25-41.html
Restart Required: Yes
Instructions:
1. Open Adobe InCopy. 2. Go to Help > Check for Updates. 3. Follow prompts to install latest version. 4. Restart InCopy after installation.
🔧 Temporary Workarounds
Disable InCopy file associations
allPrevent InCopy from automatically opening potentially malicious files
Windows: Use 'Default Programs' in Control Panel to change file associations
macOS: Right-click .incx files > Get Info > Change 'Open with' to another application
Implement application control
allRestrict InCopy from executing untrusted code
Windows: Use AppLocker or Windows Defender Application Control
macOS: Use Gatekeeper and System Integrity Protection
🧯 If You Can't Patch
- Implement strict file validation policies to block untrusted InCopy documents
- Run InCopy with reduced privileges using application sandboxing or virtualization
🔍 How to Verify
Check if Vulnerable:
Check InCopy version via Help > About InCopy. If version is 20.2, 19.5.3 or earlier, system is vulnerable.Check Version:
InCopy: Help > About InCopyVerify Fix Applied:
Verify InCopy version is 20.3 or later via Help > About InCopy.📡 Detection & Monitoring
Log Indicators:
- Unexpected InCopy crashes
- Suspicious child processes spawned from InCopy
- Unusual file access patterns from InCopy
Network Indicators:
- Outbound connections from InCopy to unknown IPs
- DNS requests for suspicious domains from InCopy process
SIEM Query:
process_name:"InCopy.exe" AND (event_type:process_creation OR event_type:crash)