CVE-2025-55312
📋 TL;DR
A memory corruption vulnerability in Foxit PDF and Editor allows attackers to execute arbitrary code by exploiting improper state updates when deleting PDF pages via JavaScript. This affects Windows users running vulnerable versions of Foxit software. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- Foxit PDF Reader
- Foxit PDF Editor
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution with SYSTEM privileges leading to complete system takeover, data exfiltration, and lateral movement.
Likely Case
Application crashes and denial of service; code execution possible with sophisticated exploitation.
If Mitigated
Application crashes only, with memory corruption contained by modern exploit mitigations.
🎯 Exploit Status
Exploitation requires user interaction to open a malicious PDF file. JavaScript execution in PDFs provides the attack vector.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Foxit PDF Reader/Editor 13.2 or 2025.2
Vendor Advisory: https://www.foxit.com/support/security-bulletins.html
Restart Required: Yes
Instructions:
1. Download latest version from Foxit website
2. Run installer with administrative privileges
3. Restart system after installation completes
🔧 Temporary Workarounds
Disable JavaScript in Foxit
windowsPrevents JavaScript execution in PDF files, blocking the attack vector
Open Foxit > File > Preferences > JavaScript > Uncheck 'Enable JavaScript'
Use Protected View
windowsOpen PDFs in restricted mode to limit potential damage
Open Foxit > File > Preferences > Trust Manager > Check 'Enable Safe Reading Mode'
🧯 If You Can't Patch
- Block PDF files at network perimeter using content filtering
- Use application whitelisting to prevent unauthorized Foxit execution
🔍 How to Verify
Check if Vulnerable:
Check Foxit version via Help > About. If version is below 13.2 (for v13) or below 2025.2 (for v2025), system is vulnerable.Check Version:
wmic product where "name like 'Foxit%'" get versionVerify Fix Applied:
Confirm version is 13.2 or higher (for v13) or 2025.2 or higher (for v2025) in Help > About.📡 Detection & Monitoring
Log Indicators:
- Foxit application crashes with memory access violations
- Unexpected JavaScript execution in PDF files
- Process creation from Foxit with unusual command lines
Network Indicators:
- PDF file downloads from untrusted sources
- HTTP requests to suspicious domains following PDF opening
SIEM Query:
source="windows" AND (process_name="Foxit*.exe" AND (event_id=1000 OR event_id=1001)) OR (file_name="*.pdf" AND process_name="Foxit*.exe")