How to Fix CVE-2025-2783: Critical Mojo Vulnerability in Google Chrome on Windows Requiring Immediate Patching

A recently discovered high-severity vulnerability, identified as CVE-2025-2783, affects Google Chrome running on Windows operating systems. This flaw, residing in the Mojo component, involves an incorrect handle being provided under specific, unspecified circumstances. Security researchers Boris Larin and Igor Kuznetsov from Kaspersky reported this vulnerability on March 20, 2025. Given the potential impact, security professionals must prioritize patching this vulnerability to protect systems from potential exploitation. This article provides a detailed analysis of CVE-2025-2783 and guidance on how to mitigate the risk.

A Short Introduction to Mojo

Mojo is a collection of libraries providing an abstraction layer for inter-process communication (IPC). It is a key component of Google Chrome's architecture, enabling communication between different parts of the browser and enforcing security boundaries between them. The Mojo IPC system facilitates the development of complex applications by allowing different components to operate independently and securely. Any vulnerabilities in the Mojo system, like CVE-2025-2783, can lead to significant security risks for the entire browser.

Summary of CVE-2025-2783

This vulnerability arises from an incorrect handle being provided within the Mojo IPC system under unspecified conditions. This improper handling allows a remote attacker to potentially escape the Chrome sandbox by exploiting a malicious file. The Chromium security team has classified the severity of this flaw as high, reflecting the potential for significant compromise if exploited. Given that the NVD assessment hasn't been provided yet, a CVSS score is estimated to be around 9 to 10 given that there is a proof of concept available and its exploitation reported by Google.

Impact of CVE-2025-2783

The exploitation of CVE-2025-2783 can lead to several severe consequences:

The attack requires network access and user interaction, coupled with a high attack complexity. However, the potential for remote code execution or system compromise is significant. The availability of a proof-of-concept exploit on platforms like GitHub exacerbates the risk, making it easier for malicious actors to leverage the vulnerability. Organizations must prioritize addressing this flaw to prevent potential exploitation.

Products Affected by CVE-2025-2783

The following product version is affected by the vulnerability:

The vulnerability specifically affects Google Chrome running on Windows operating systems. Users of other operating systems or browsers based on Chromium (e.g., Microsoft Edge) should monitor for similar patches from their respective vendors.

How to Check Your Product is Vulnerable?

To determine if your Google Chrome installation is vulnerable, follow these steps:

How to Fix CVE-2025-2783?

The primary remediation strategy is to update Google Chrome to the patched version.

By following these steps, organizations can significantly reduce the risk posed by CVE-2025-2783 and protect their systems from potential attacks.

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