CVE-2025-11209: Google Chrome XSS Vulnerability

CVE-2025-11209 Overview

CVE-2025-11209 is a URL spoofing vulnerability in the Omnibox component of Google Chrome on Android devices. The inappropriate implementation allows a remote attacker to spoof the contents of the Omnibox (URL bar) via a crafted HTML page. This vulnerability could enable phishing attacks by deceiving users into believing they are visiting a legitimate website when they are actually on a malicious page.

Critical Impact

Attackers can manipulate the URL bar display on Chrome for Android, enabling sophisticated phishing attacks that bypass user trust indicators. Users may unknowingly enter sensitive credentials or personal information on malicious sites believing they are on legitimate domains.

Affected Products

• Google Chrome on Android prior to version 141.0.7390.54
• Google Chrome browser for Android platform
• Google Android devices running vulnerable Chrome versions

Discovery Timeline

• 2025-11-06 - CVE-2025-11209 published to NVD
• 2025-11-13 - Last updated in NVD database

Technical Details for CVE-2025-11209

Vulnerability Analysis

This vulnerability stems from an inappropriate implementation in Chrome's Omnibox component, which is responsible for displaying and managing the URL bar in the browser. The Omnibox serves as a critical trust indicator for users, showing them which website they are currently visiting. When this component fails to properly handle certain HTML constructs, attackers can manipulate what users see in the address bar.

The vulnerability is classified under CWE-290 (Authentication Bypass by Spoofing), indicating that the flaw allows attackers to bypass the visual authentication mechanism that users rely on to verify website authenticity. This is particularly dangerous on mobile devices where screen real estate is limited and users may be less vigilant about verifying URLs.

Root Cause

The root cause of CVE-2025-11209 lies in the improper handling of specially crafted HTML content by Chrome's Omnibox implementation on Android. The Omnibox fails to correctly sanitize or validate certain inputs that influence how the URL is displayed to users. This allows malicious web content to manipulate the visual representation of the current URL without actually changing the underlying navigation context.

Attack Vector

The attack vector for this vulnerability is network-based and requires no user authentication or special privileges. An attacker can exploit this vulnerability by:

1. Creating a malicious HTML page with specially crafted elements designed to trigger the Omnibox spoofing behavior
2. Luring victims to visit the malicious page through phishing emails, social media links, or compromised advertisements
3. Once the victim loads the page, the Omnibox displays a spoofed URL (such as a legitimate banking or social media domain)
4. The victim, believing they are on a trusted site, may enter sensitive information that the attacker can capture

The attack requires no user interaction beyond visiting the malicious page, making it particularly effective for large-scale phishing campaigns targeting mobile users. Technical details can be found in the Chromium Issue Tracker #438226517.

Detection Methods for CVE-2025-11209

Indicators of Compromise

• Unusual browser behavior where the URL bar content does not match the expected page content
• User reports of visiting websites that appear legitimate but have unexpected behavior
• Increased phishing incidents involving mobile Chrome users in your organization
• Network traffic to known malicious domains despite URL bar showing legitimate addresses

Detection Strategies

• Monitor for phishing attempts specifically targeting mobile Chrome users
• Implement web filtering solutions that can detect and block known malicious HTML patterns
• Deploy endpoint detection solutions that can identify suspicious browser behavior on Android devices
• Review security telemetry from mobile device management (MDM) solutions for anomalous browsing patterns

Monitoring Recommendations

• Enable Chrome browser telemetry and logging where permitted by organizational policies
• Monitor user-reported phishing incidents for patterns related to URL spoofing attacks
• Track Chrome version deployment across the organization to identify vulnerable installations
• Implement network-level monitoring to detect connections to suspicious domains regardless of displayed URLs

How to Mitigate CVE-2025-11209

Immediate Actions Required

• Update Google Chrome on all Android devices to version 141.0.7390.54 or later immediately
• Alert users about the potential for URL spoofing attacks on unpatched Chrome installations
• Review and strengthen organizational phishing awareness training with emphasis on mobile security
• Consider implementing temporary restrictions on untrusted website access from vulnerable devices

Patch Information

Google has addressed this vulnerability in Chrome version 141.0.7390.54 for Android. Organizations should prioritize updating Chrome on all Android devices through their mobile device management solutions or by directing users to update manually through the Google Play Store.

For detailed patch information, refer to the Google Chrome Stable Update announcement.

Workarounds

• Advise users to verify website authenticity through multiple indicators rather than relying solely on the URL bar
• Encourage users to manually type sensitive website URLs rather than following links from untrusted sources
• Consider using alternative browsers on Android until the patch can be deployed
• Implement network-level web filtering to block access to known malicious sites

# Verify Chrome version on Android devices via ADB
adb shell dumpsys package com.android.chrome | grep versionName
# Expected output should show version 141.0.7390.54 or higher

# Force update check via Google Play Store (user action required)
# Settings > Apps > Google Chrome > Update (if available)