Google Chrome up to 139.0.7258.154 Extensions ui layer

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.1$5k-$25k0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Google Chrome. Affected by this vulnerability is an unknown functionality of the component Extensions. The manipulation leads to ui layer. This vulnerability is documented as CVE-2025-9866. The attack can be initiated remotely. There is not any exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Google Chrome and classified as problematic. This issue affects an unknown functionality of the component Extensions. The manipulation with an unknown input leads to a ui layer vulnerability. Using CWE to declare the problem leads to CWE-1021. The web application does not restrict or incorrectly restricts frame objects or UI layers that belong to another application or domain, which can lead to user confusion about which interface the user is interacting with. Impacted is integrity. The summary by CVE is:

Inappropriate implementation in Extensions in Google Chrome prior to 140.0.7339.80 allowed a remote attacker to bypass content security policy via a crafted HTML page. (Chromium security severity: Medium)

The advisory is shared at chromereleases.googleblog.com. The identification of this vulnerability is CVE-2025-9866 since 09/02/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 11/17/2025).

The vulnerability scanner Nessus provides a plugin with the ID 261536 (Linux Distros Unpatched Vulnerability : CVE-2025-9866), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 140.0.7339.80 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (261536), EUVD (EUVD-2025-26672) and CERT Bund (WID-SEC-2025-1946). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Debian Linux
  • Fedora Linux
  • SUSE openSUSE
  • Google Chrome
  • Microsoft Edge

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
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: Ui layer
CWE: CWE-1021
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: 261536
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2025-9866

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Chrome 140.0.7339.80

Timelineinfo

09/02/2025 CVE reserved
09/03/2025 +1 days Advisory disclosed
09/03/2025 +0 days VulDB entry created
11/17/2025 +75 days VulDB entry last update

Sourcesinfo

Vendor: google.com
Product: google.com

Advisory: 379337
Status: Confirmed

CVE: CVE-2025-9866 (🔒)
GCVE (CVE): GCVE-0-2025-9866
GCVE (VulDB): GCVE-100-322421
EUVD: 🔒
CERT Bund: WID-SEC-2025-1946 - Google Chrome/Microsoft Edge: Mehrere Schwachstellen

Entryinfo

Created: 09/03/2025 23:30
Updated: 11/17/2025 19:31
Changes: 09/03/2025 23:30 (58), 09/04/2025 10:41 (1), 09/04/2025 11:38 (7), 09/06/2025 16:23 (2), 11/17/2025 19:31 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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