A recently disclosed vulnerability, cataloged as CVE-2023-38133, has been raising security concerns for users across various Apple devices and platforms. The issue stems from the improper processing of specific web content that may result in sensitive information disclosure. Fortunately, this vulnerability has been successfully addressed through improved checks implemented in the latest updates of iOS, iPadOS, tvOS, macOS, Safari, and watchOS.

In this post, we'll take a closer look at the details of this vulnerability, the platforms affected, and the recommended steps users should take to protect their devices.

Details of the Exploit

The CVE-2023-38133 vulnerability involved the mishandling of specific web content during its processing that could potentially lead to a sensitive data exposure. Prior to the updates, attackers could exploit this issue by leveraging a crafted web page or malicious script to steal sensitive user information such as login credentials, files, or personal data.

Upon investigation, Apple discovered that the underlying issue resulted from insufficient validation and sanitization processes. To mitigate this vulnerability and reduce the risk of data leakage, Apple implemented improved checks which now successfully block such attacks.

The following code snippet demonstrates how an attacker might have exploited the vulnerability

// Load malicious resource
const xhttp = new XMLHttpRequest();
xhttp.onload = function () {
    let leakedInformation = xhttp.responseText;
    // Send leakedInformation to the attacker's server
xhttp.open('GET', 'https://vulnerable-website.com/sensitive-data';, true);

Please note that this simple example is for illustrative purposes only and may not fully reflect the complexity of actual exploits.


To address the vulnerability, Apple has released software updates that introduce improved checks to prevent the unauthorized processing and disclosure of sensitive information:

watchOS 9.6

Users are encouraged to update their devices to the latest available software version as soon as possible.

Original References

For more information on the CVE-2023-38133 vulnerability, as well as the latest Apple security updates, you can refer to the following sources:

- Apple Security Advisory
- CVE Details
- National Vulnerability Database Entry


The discovery of this critical vulnerability highlights the importance of ongoing security research and updates. With the implementation of improved checks, Apple has successfully mitigated the risk of sensitive information disclosure, ensuring device and user safety across their ecosystem.

Keep your devices and sensitive information secure by staying vigilant and updating your software to the latest version as soon as it becomes available.


Published on: 07/27/2023 00:15:15 UTC
Last modified on: 08/18/2023 03:15:15 UTC