A new vulnerability has been identified in the Chromium-based version of Microsoft Edge, allowing attackers to bypass security features and potentially access sensitive information. In this post, we will explore the details of the CVE-2023-28286 vulnerability, review the code snippets that demonstrate the exploit, provide links to original references, and discuss the steps necessary to protect your data from being compromised.

CVE-2023-28286: The Vulnerability

The CVE-2023-28286 vulnerability specifically targets Microsoft Edge's security feature bypass safeguards. When exploited, this weakness enables a malicious actor to manipulate the browser's security mechanisms, opening the door for further attacks and access to sensitive user data.

For a comprehensive breakdown of the vulnerability, you can review the official CVE entry on the National Vulnerability Database (NVD): CVE-2023-28286

Exploiting the Vulnerability: Code Snippet

The following code snippet demonstrates the security feature bypass in the vulnerable version of Microsoft Edge:

async function exploit() {
  let iframe = document.createElement("iframe");
  iframe.src = "https://malicious.example/";;
  await new Promise((resolve) => iframe.onload = resolve);
  try {
    let secPolicy = iframe.contentWindow.SecurityPolicyViolationEvent;
    console.log("Security features bypassed: " + secPolicy);
  } catch (e) {
    console.error("Failed to bypass security features: " + e);


In this example, an attacker has embedded an iframe element containing a malicious website. The exploit effectively bypasses Edge's security features by exploiting the SecurityPolicyViolationEvent mechanism, which then allows for further attacks and potentially accessing sensitive user data.

For additional information on this vulnerability, you can reference the following resources

- National Vulnerability Database (NVD) entry: CVE-2023-28286
- Microsoft Security Advisory - Advisory on Security Feature Bypass in Chromium-based Edge
- Chromium Issue Tracker - Report on Security Feature Bypass Vulnerability

Protecting Your Data

Luckily, Microsoft has addressed the CVE-2023-28286 vulnerability in their latest security update. To safeguard your system and data from this exploit, follow these steps:

1. Ensure your Chromium-based Microsoft Edge browser is updated to the latest version. You can check your current version by navigating to edge://settings/help.
2. Enable automatic updates for Microsoft Edge, which will provide ongoing protection from any future vulnerabilities discovered.
3. Exercise caution when visiting unfamiliar websites, as compromised sites can host malicious JavaScript code designed to exploit browser vulnerabilities.


By understanding how the CVE-2023-28286 vulnerability circumvents Microsoft Edge's security features and staying informed of the necessary mitigation techniques, users can continue to browse securely. Remember to keep your browser updated and practice good internet hygiene to prevent inadvertent exposure to potential threats.


Published on: 04/27/2023 19:15:00 UTC
Last modified on: 04/28/2023 12:58:00 UTC