CVE-2021-3988 Information

Description

A Cross-site Scripting (XSS) vulnerability exists in janeczku/calibre-web specifically in the file edit_books.js. The vulnerability occurs when editing book properties such as uploading a cover or a format. The affected code directly inserts user input into the DOM without proper sanitization allowing attackers to execute arbitrary JavaScript code. This can lead to various attacks including stealing cookies. The issue is present in the code handling the btn-upload-cover change event.

Reference

https://huntr.com/bounties/fa4c8fd1-7846-4dad-9112-2c07461f0609 https://github.com/janeczku/calibre-web/commit/7ad419dc8c12180e842a82118f4866ac3d074bc5