CVE-2025-13025
📋 TL;DR
This vulnerability involves incorrect boundary conditions in Firefox and Thunderbird's WebGPU component, allowing memory corruption. Attackers could exploit this to execute arbitrary code or cause denial of service. Users of Firefox < 145 or Thunderbird < 145 are affected.
💻 Affected Systems
- Mozilla Firefox
- Mozilla Thunderbird
📦 What is this software?
Firefox by Mozilla
⚠️ Risk & Real-World Impact
Worst Case
Remote code execution leading to full system compromise, data theft, or malware installation.
Likely Case
Browser crash or denial of service, potentially enabling sandbox escape in combination with other vulnerabilities.
If Mitigated
Limited impact due to sandboxing, but potential for memory corruption within the browser process.
🎯 Exploit Status
Exploitation requires user to visit a malicious website or open a malicious email. No public exploit code is known at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Firefox 145, Thunderbird 145
Vendor Advisory: https://www.mozilla.org/security/advisories/mfsa2025-87/
Restart Required: Yes
Instructions:
1. Open Firefox/Thunderbird. 2. Click menu → Help → About Firefox/Thunderbird. 3. Allow automatic update to version 145. 4. Restart the application when prompted.
🔧 Temporary Workarounds
Disable WebGPU
allTemporarily disable the WebGPU feature to prevent exploitation.
In Firefox/Thunderbird address bar, type: about:config
Search for: dom.webgpu.enabled
Set to: false
🧯 If You Can't Patch
- Disable JavaScript in Firefox/Thunderbird settings to reduce attack surface.
- Use alternative browsers/email clients until patches can be applied.
🔍 How to Verify
Check if Vulnerable:
Check Firefox/Thunderbird version in Help → About. If version is less than 145, the system is vulnerable.Check Version:
firefox --version (Linux) or check About dialog on Windows/macOSVerify Fix Applied:
Confirm version is 145 or higher in Help → About. Verify WebGPU functionality works normally if needed.📡 Detection & Monitoring
Log Indicators:
- Browser crash reports with WebGPU-related stack traces
- Unexpected process termination of Firefox/Thunderbird
Network Indicators:
- Requests to suspicious domains hosting WebGPU content
- Unusual WebGPU API calls in web traffic
SIEM Query:
source="firefox.log" AND ("crash" OR "WebGPU" OR "out-of-bounds")