CVE-2025-13992
📋 TL;DR
This side-channel vulnerability in Google Chrome allows attackers to bypass site isolation protections by exploiting navigation and loading behaviors. Attackers can potentially leak cross-origin information through timing attacks. All Chrome users on vulnerable versions are affected.
💻 Affected Systems
- Google Chrome
- Chromium-based browsers
📦 What is this software?
Chrome by Google
Google Chrome is the world's most popular web browser, used by over 3 billion users globally across Windows, macOS, Linux, Android, and iOS platforms. As a Chromium-based browser developed by Google, Chrome dominates the browser market with approximately 65% market share, making it a critical compon...
Learn more about Chrome →⚠️ Risk & Real-World Impact
Worst Case
Complete bypass of site isolation leading to cross-origin data theft, including sensitive information from other tabs or windows
Likely Case
Limited information leakage about visited sites or user behavior through timing side-channels
If Mitigated
No impact if Chrome is updated to patched version or site isolation is disabled (not recommended)
🎯 Exploit Status
Requires crafted HTML page and timing measurements. No public exploit code available at disclosure.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 139.0.7258.66 and later
Vendor Advisory: https://chromereleases.googleblog.com/2025/08/stable-channel-update-for-desktop.html
Restart Required: Yes
Instructions:
1. Open Chrome menu > Help > About Google Chrome. 2. Chrome will automatically check for updates. 3. If update available, click 'Update Google Chrome'. 4. Click 'Relaunch' to restart Chrome with updated version.
🔧 Temporary Workarounds
Disable Site Isolation (NOT RECOMMENDED)
allDisabling site isolation removes the attack surface but significantly reduces security
chrome://flags/#site-isolation-trial-opt-out
Set to 'Opt-out' and restart
🧯 If You Can't Patch
- Use alternative browser with site isolation protections
- Implement network filtering to block known malicious sites
🔍 How to Verify
Check if Vulnerable:
Check Chrome version: chrome://version/ - if version is less than 139.0.7258.66, system is vulnerableCheck Version:
On Windows: ""C:\Program Files\Google\Chrome\Application\chrome.exe" --version" On Linux: "google-chrome --version" On macOS: "/Applications/Google Chrome.app/Contents/MacOS/Google Chrome --version"Verify Fix Applied:
Confirm Chrome version is 139.0.7258.66 or higher via chrome://version/📡 Detection & Monitoring
Log Indicators:
- Unusual navigation patterns in Chrome logs
- Multiple cross-origin timing requests
Network Indicators:
- Suspicious HTML pages with timing measurement scripts
- Unusual iframe loading patterns
SIEM Query:
source="chrome*" AND ("cross-origin" OR "site-isolation") AND ("timing" OR "performance.now")