CVE-2025-12906
📋 TL;DR
This vulnerability allows attackers to create deceptive UI elements in Google Chrome through crafted HTML pages, tricking users into unintended actions. It affects all users running vulnerable versions of Chrome before 140.0.7339.80. The attack requires user interaction with malicious web content.
💻 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
Users could be tricked into clicking fake UI elements that appear legitimate, potentially leading to credential theft, malware installation, or unauthorized data access through social engineering.
Likely Case
Attackers create convincing fake permission prompts or interface elements that trick users into granting permissions or clicking malicious links, leading to phishing or limited data exposure.
If Mitigated
With proper user awareness training and browser security settings, users would recognize suspicious UI elements and avoid interacting with them, preventing successful exploitation.
🎯 Exploit Status
Exploitation requires user interaction with malicious web content. No authentication needed beyond visiting a crafted page.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 140.0.7339.80 and later
Vendor Advisory: https://chromereleases.googleblog.com/2025/09/stable-channel-update-for-desktop.html
Restart Required: Yes
Instructions:
1. Open Chrome. 2. Click the three-dot menu → Help → About Google Chrome. 3. Chrome will automatically check for and install updates. 4. Click 'Relaunch' to restart Chrome with the fixed version.
🔧 Temporary Workarounds
Disable automatic permission grants
allConfigure Chrome to ask before granting permissions like location, camera, or microphone
chrome://settings/content
Enable Enhanced Safe Browsing
allProvides additional protection against malicious websites and phishing
chrome://settings/security
🧯 If You Can't Patch
- Use alternative browsers until Chrome can be updated
- Implement web filtering to block known malicious sites and restrict user access to untrusted domains
🔍 How to Verify
Check if Vulnerable:
Check Chrome version in Settings → About Chrome. If version is below 140.0.7339.80, system is vulnerable.Check Version:
chrome://version/Verify Fix Applied:
Confirm Chrome version is 140.0.7339.80 or higher after update and restart.📡 Detection & Monitoring
Log Indicators:
- Unusual permission grant patterns
- Multiple permission requests from same domain
Network Indicators:
- Traffic to domains hosting crafted HTML pages with permission requests
SIEM Query:
source="chrome_audit_log" AND (event="permission_grant" OR event="permission_request") AND user_agent="*Chrome/13[0-9].*"