CVE-2025-32451 Overview
A memory corruption vulnerability exists in Foxit Reader 2025.1.0.27937 due to the use of an uninitialized pointer. A specially crafted Javascript code inside a malicious PDF document can trigger this vulnerability, which can lead to memory corruption and result in arbitrary code execution. An attacker needs to trick the user into opening the malicious file to trigger this vulnerability. Exploitation is also possible if a user visits a specially crafted, malicious site if the browser plugin extension is enabled.
Critical Impact
This uninitialized pointer vulnerability enables arbitrary code execution through malicious PDF documents or web pages, potentially allowing attackers to gain full control of affected systems when users open crafted PDF files or visit malicious websites with the browser plugin enabled.
Affected Products
- Foxit PDF Reader version 2025.1.0.27937
- Systems with Foxit PDF Reader browser plugin extension enabled
- Windows environments running vulnerable Foxit Reader installations
Discovery Timeline
- 2025-08-13 - CVE-2025-32451 published to NVD
- 2025-11-03 - Last updated in NVD database
Technical Details for CVE-2025-32451
Vulnerability Analysis
This vulnerability is classified as CWE-824 (Access of Uninitialized Pointer), a memory corruption flaw that occurs when Foxit Reader processes specially crafted JavaScript code embedded within PDF documents. The uninitialized pointer issue allows attackers to manipulate memory in unintended ways, creating an opportunity for arbitrary code execution on the victim's system.
The vulnerability requires user interaction to trigger—specifically, the victim must open a malicious PDF file or visit a compromised website while the Foxit Reader browser plugin is active. Once triggered, the memory corruption can lead to complete system compromise with the privileges of the current user.
Root Cause
The root cause of CVE-2025-32451 lies in improper memory initialization within Foxit Reader's JavaScript processing engine. When handling certain JavaScript operations in PDF documents, the application accesses a pointer before it has been properly initialized. This uninitialized pointer may contain arbitrary data from previous memory allocations, which an attacker can leverage to redirect program execution to attacker-controlled memory regions.
Attack Vector
The attack vector is network-based and requires user interaction. Attackers can exploit this vulnerability through two primary methods:
Malicious PDF Document: An attacker crafts a PDF file containing specially designed JavaScript code that triggers the uninitialized pointer access. When a victim opens this file with Foxit Reader, the vulnerability is exploited.
Browser Plugin Attack: If the user has the Foxit Reader browser plugin enabled, visiting a malicious website that serves the crafted PDF content can trigger the vulnerability without explicitly downloading a file.
The vulnerability can be exploited remotely without requiring authentication, though the attack complexity is low once the malicious content is delivered to the target. For detailed technical analysis, refer to the Talos Intelligence Vulnerability Report.
Detection Methods for CVE-2025-32451
Indicators of Compromise
- Unexpected crashes or abnormal behavior in FoxitPDFReader.exe or related browser plugin processes
- PDF documents with heavily obfuscated or suspicious JavaScript content
- Unusual network connections originating from Foxit Reader processes
- Memory access violations or exception logs related to Foxit Reader JavaScript engine
Detection Strategies
- Monitor for PDF files with embedded JavaScript that utilize uncommon or suspicious API calls
- Implement endpoint detection rules for abnormal memory access patterns in Foxit Reader processes
- Deploy file inspection capabilities to identify PDF documents with malformed or exploit-like structures
- Enable application crash monitoring and analyze dump files for signs of memory corruption attacks
Monitoring Recommendations
- Enable detailed logging for Foxit Reader application events and JavaScript execution
- Configure SIEM alerts for repeated PDF-related crashes or memory exceptions
- Monitor browser plugin activity for unusual PDF rendering requests from untrusted domains
- Implement network traffic analysis to detect delivery of suspicious PDF payloads
How to Mitigate CVE-2025-32451
Immediate Actions Required
- Update Foxit PDF Reader to the latest patched version immediately
- Disable the Foxit Reader browser plugin extension until patching is complete
- Configure JavaScript execution to be disabled in Foxit Reader settings as a temporary measure
- Implement email and web filtering to block suspicious PDF attachments from untrusted sources
- Educate users about the risks of opening PDF documents from unknown sources
Patch Information
Organizations should update Foxit PDF Reader to a version that addresses CVE-2025-32451. Check the Talos Intelligence Vulnerability Report and Foxit's official security advisories for specific patch information and updated software versions.
Workarounds
- Disable JavaScript execution in Foxit Reader by navigating to Edit > Preferences > JavaScript and unchecking "Enable JavaScript Actions"
- Remove or disable the Foxit Reader browser plugin from all web browsers
- Use alternative PDF readers for viewing documents from untrusted sources until patching is complete
- Implement application whitelisting to prevent execution of untrusted PDF processing
# Configuration example: Disable JavaScript in Foxit Reader via registry (Windows)
# Run in elevated command prompt
reg add "HKEY_CURRENT_USER\Software\Foxit Software\Foxit PDF Reader\Preferences\Others" /v bEnableJS /t REG_DWORD /d 0 /f
# Disable browser plugin by removing plugin files (adjust path as needed)
del /f /q "%ProgramFiles%\Foxit Software\Foxit PDF Reader\plugins\npFoxitPDFReaderPlugin*.dll"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
