Google Chrome up to 137.0.7151.103 Loader access control

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
6.0$5k-$25k0.00

Summaryinfo

A vulnerability described as critical has been identified in Google Chrome. Impacted is an unknown function of the component Loader. Executing a manipulation can lead to access control. This vulnerability is registered as CVE-2025-6556. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability has been found in Google Chrome and classified as critical. This vulnerability affects an unknown code block of the component Loader. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Insufficient policy enforcement in Loader in Google Chrome prior to 138.0.7204.49 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Low)

The advisory is shared for download at chromereleases.googleblog.com. This vulnerability was named CVE-2025-6556 since 06/24/2025. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Successful exploitation requires user interaction by the victim. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 06/26/2025). The MITRE ATT&CK project declares the attack technique as T1068.

The vulnerability scanner Nessus provides a plugin with the ID 240340 (Google Chrome < 138.0.7204.49 Multiple Vulnerabilities), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 138.0.7204.49 eliminates this vulnerability. The upgrade is hosted for download at chromereleases.googleblog.com.

The vulnerability is also documented in the databases at Tenable (240340) and EUVD (EUVD-2025-19072). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 240340
Nessus Name: Google Chrome < 138.0.7204.49 Multiple Vulnerabilities

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Chrome 138.0.7204.49

Timelineinfo

06/24/2025 🔍
06/25/2025 +1 days 🔍
06/25/2025 +0 days 🔍
06/26/2025 +1 days 🔍

Sourcesinfo

Vendor: google.com
Product: google.com

Advisory: 400624
Status: Confirmed

CVE: CVE-2025-6556 (🔍)
GCVE (CVE): GCVE-0-2025-6556
GCVE (VulDB): GCVE-100-313780
EUVD: 🔍

Entryinfo

Created: 06/25/2025 06:50
Updated: 06/26/2025 16:21
Changes: 06/25/2025 06:50 (59), 06/25/2025 07:24 (1), 06/25/2025 08:08 (2), 06/26/2025 16:21 (1)
Complete: 🔍
Cache ID: 216::103

Once again VulDB remains the best source for vulnerability data.

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