CVE-2025-3072
📋 TL;DR
This vulnerability allows attackers to spoof UI elements in Chrome's Custom Tabs feature by tricking users into performing specific gestures on a malicious webpage. It affects Chrome users on all platforms who haven't updated to the patched version. The attacker needs user interaction to exploit this flaw.
💻 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 create convincing fake login prompts, payment forms, or security warnings that appear legitimate, potentially leading to credential theft, financial fraud, or malware installation.
Likely Case
Phishing attacks where users are tricked into entering sensitive information into spoofed UI elements that appear to be from legitimate websites.
If Mitigated
With proper user awareness training and updated browsers, impact is minimal as users should recognize suspicious UI behavior and avoid interacting with untrusted sites.
🎯 Exploit Status
Exploitation requires user interaction (specific UI gestures) and a crafted HTML page. No authentication is needed to trigger the vulnerability.
🛠️ 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. 3. Go to Help > About Google Chrome. 4. Chrome will automatically check for and install updates. 5. Click 'Relaunch' to restart Chrome with the update.
🔧 Temporary Workarounds
Disable Custom Tabs
allPrevent Chrome from using Custom Tabs feature by disabling it in flags
chrome://flags/#enable-custom-tabs
Set to Disabled
Use Incognito Mode for Untrusted Sites
allOpen potentially malicious links in Incognito mode which may limit some UI spoofing capabilities
🧯 If You Can't Patch
- Implement web filtering to block known malicious sites that could host exploit pages
- Enable enhanced phishing protection in Chrome settings and educate users about UI spoofing risks
🔍 How to Verify
Check if Vulnerable:
Check Chrome version via chrome://version and compare to vulnerable range (below 135.0.7049.52)Check Version:
chrome://version or 'google-chrome --version' on Linux/macOS terminalVerify Fix Applied:
Confirm Chrome version is 135.0.7049.52 or higher and test Custom Tabs behavior with known test cases📡 Detection & Monitoring
Log Indicators:
- Unusual Custom Tabs usage patterns
- Multiple failed authentication attempts following Custom Tabs sessions
Network Indicators:
- Connections to known phishing domains followed by Custom Tabs activity
SIEM Query:
source="chrome_audit_log" AND event="custom_tab_interaction" AND url CONTAINS suspicious_domain