CVE-2023-1496 Scanner

Imgproxy is a powerful and efficient server for resizing and converting remote images. Developed by Evil Martians, it is designed to securely fetch images from remote sources, resize them on the fly, and deliver them to users, optimizing web application performance and user experience. The software is particularly favored for its ability to reduce load times and bandwidth usage by dynamically adjusting image sizes based on user requirements. Used by web developers and content management systems worldwide, Imgproxy plays a crucial role in web performance optimization and content delivery. The vulnerability in question affects versions of Imgproxy prior to 3.14.0.

CVE-2023-1496 identifies a medium-severity Cross-site Scripting (XSS) vulnerability within Imgproxy, specifically in versions before 3.14.0. This reflected XSS issue allows attackers to inject arbitrary JavaScript code into web pages viewed by other users. Such vulnerabilities can lead to unauthorized actions being taken on behalf of the users, data theft, and potentially compromising user sessions. Addressing this vulnerability is essential to maintain the integrity and security of web applications using Imgproxy.

The vulnerability arises from the improper handling of user-supplied input in URLs processed by Imgproxy. By crafting a malicious URL that includes an SVG image containing JavaScript code, an attacker can trigger the XSS condition when the image is processed and displayed by Imgproxy. This issue highlights the importance of sanitizing and validating all external inputs to prevent malicious code execution within the application or on client-side browsers. Versions before 3.14.0 are susceptible to this vulnerability, emphasizing the need for timely updates.

Successful exploitation of the XSS vulnerability in Imgproxy could lead to several adverse effects, including the execution of unauthorized scripts, stealing of cookies or session tokens, redirection of users to malicious sites, and manipulation of web page content. These actions can compromise user privacy, security, and trust in the web application. It underscores the critical nature of securing web applications against XSS attacks to protect both users and organizations.

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References

• https://github.com/imgproxy/imgproxy/commit/62f8d08a93d301285dcd1dabcc7ba10c6c65b689
• https://huntr.dev/bounties/de603972-935a-401a-96fb-17ddadd282b2