CVE-2025-3070
📋 TL;DR
This vulnerability in Google Chrome extensions allows attackers to escalate privileges by tricking users into visiting a malicious webpage. It affects all Chrome users running versions before 135.0.7049.52. The attacker could gain elevated permissions within the browser extension context.
💻 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
An attacker could gain full control over browser extensions, potentially accessing sensitive data, modifying web content, or performing actions as the user.
Likely Case
Attackers could use this to steal session cookies, credentials, or personal data through compromised extensions.
If Mitigated
With proper patching, the risk is eliminated; with network controls, the attack surface is reduced but not eliminated.
🎯 Exploit Status
Exploitation requires user interaction (visiting malicious page) but no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 135.0.7049.52 and later
Vendor Advisory: https://chromereleases.googleblog.com/2025/04/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.
🔧 Temporary Workarounds
Disable extensions temporarily
allDisable all extensions to reduce attack surface while waiting to patch.
chrome://extensions/ → toggle off each extension
Use browser isolation
allUse browser isolation solutions to contain malicious content.
🧯 If You Can't Patch
- Restrict access to untrusted websites via web filtering
- Implement application control to block older Chrome versions
🔍 How to Verify
Check if Vulnerable:
Check Chrome version via chrome://settings/help or 'About Google Chrome' in menu.Check Version:
On command line: google-chrome --version (Linux) or check via browser interface on Windows/macOS.Verify Fix Applied:
Confirm version is 135.0.7049.52 or higher after update.📡 Detection & Monitoring
Log Indicators:
- Unusual extension activity logs
- Chrome crash reports with extension-related errors
Network Indicators:
- Requests to known malicious domains from Chrome
- Unusual outbound traffic patterns
SIEM Query:
source="chrome" AND (event="extension_error" OR event="crash") AND version<"135.0.7049.52"