CVE-2025-4052: Google Chrome Auth Bypass Vulnerability

CVE-2025-4052 Overview

CVE-2025-4052 is an inappropriate implementation vulnerability in the DevTools component of Google Chrome prior to version 136.0.7103.59. This flaw allows a remote attacker who convinces a user to engage in specific UI gestures to bypass discretionary access control via a crafted HTML page. While Chromium classifies the security severity as Low, the vulnerability's network-based attack vector and potential for access control bypass make it a concern for enterprise environments.

Critical Impact

Remote attackers can bypass discretionary access control mechanisms by exploiting improper implementation in Chrome DevTools, potentially leading to unauthorized access when users interact with malicious HTML pages.

Affected Products

• Google Chrome versions prior to 136.0.7103.59
• All platforms running vulnerable Chrome versions (Windows, macOS, Linux)
• Chromium-based browsers that have not incorporated the security fix

Discovery Timeline

• May 5, 2025 - CVE-2025-4052 published to NVD
• May 28, 2025 - Last updated in NVD database

Technical Details for CVE-2025-4052

Vulnerability Analysis

This vulnerability stems from an inappropriate implementation within Chrome's DevTools component. The flaw is classified under CWE-838 (Inappropriate Encoding for Output Context), indicating that the vulnerability relates to how data is handled and encoded within the DevTools interface.

The attack requires user interaction—specifically, the victim must be convinced to perform certain UI gestures while viewing a malicious HTML page. When exploited, this allows the attacker to bypass discretionary access control (DAC) mechanisms that normally protect sensitive browser functionality and user data.

DevTools is a powerful debugging and development interface built into Chrome that provides deep access to browser internals, DOM manipulation, network inspection, and JavaScript debugging capabilities. An access control bypass in this context could allow attackers to perform privileged operations that should normally be restricted.

Root Cause

The root cause is an inappropriate implementation in how DevTools handles certain operations when processing crafted HTML content. The vulnerability allows attackers to circumvent the discretionary access control mechanisms that are designed to prevent unauthorized access to DevTools functionality. This implementation flaw creates a pathway where specific user interactions can be leveraged to bypass security boundaries.

Attack Vector

The attack vector is network-based and requires social engineering to convince the target user to:

1. Visit a malicious webpage containing crafted HTML
2. Perform specific UI gestures while on the page
3. Have DevTools open or interact with DevTools-related functionality

The attacker must craft an HTML page designed to exploit the inappropriate implementation. When the victim performs the required UI interactions, the discretionary access control bypass is triggered, potentially allowing the attacker to gain unauthorized access to protected resources or functionality.

Detection Methods for CVE-2025-4052

Indicators of Compromise

• Unusual DevTools activity or unexpected DevTools panel behavior during normal browsing
• Browser logs showing abnormal access patterns to DevTools-protected resources
• Network traffic to suspicious domains followed by unusual browser behavior
• User reports of unexpected prompts or UI elements when interacting with web pages

Detection Strategies

• Monitor for Chrome crash reports or stability issues related to DevTools components
• Implement network monitoring to detect connections to known malicious domains serving exploit pages
• Deploy endpoint detection solutions capable of identifying abnormal browser process behavior
• Review browser extension logs for unauthorized access attempts to DevTools APIs

Monitoring Recommendations

• Enable Chrome Enterprise logging to capture detailed browser events
• Configure SentinelOne to monitor for anomalous Chrome process behavior and memory access patterns
• Implement web filtering to block access to domains known to host browser exploits
• Establish baseline DevTools usage patterns to detect anomalies in enterprise environments

How to Mitigate CVE-2025-4052

Immediate Actions Required

• Update Google Chrome to version 136.0.7103.59 or later immediately
• Enable automatic updates for Chrome across all enterprise endpoints
• Educate users about the risks of interacting with suspicious web pages
• Review and restrict DevTools access in enterprise environments where not required
• Deploy browser isolation solutions for high-risk users

Patch Information

Google has released a security update addressing this vulnerability in Chrome version 136.0.7103.59. The fix is included in the stable channel update announced on April 29, 2025. Organizations should prioritize updating all Chrome installations to this version or later.

For detailed patch information, refer to the Google Chrome Update Announcement. Additional technical details may be available via the Chromium Issue Tracker Entry.

Workarounds

• Restrict or disable DevTools access using Chrome Enterprise policies where development functionality is not required
• Implement web content filtering to block access to untrusted or suspicious websites
• Configure Chrome policies to prevent users from overriding security settings
• Use browser isolation technology to sandbox browsing sessions from sensitive enterprise resources
• Consider deploying application whitelisting to control which websites users can access

# Chrome Enterprise Policy Configuration
# Disable DevTools for non-developer users
# Add to Chrome policy configuration (Windows Registry or macOS plist)

# Windows Registry path:
# HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Google\Chrome
# DeveloperToolsDisabled = 1

# Linux/macOS managed preferences:
# "DeveloperToolsAvailability": 2
# (0 = allowed, 1 = allowed for extensions, 2 = disallowed)