CVE-2024-4023 Information

Description

A stored cross-site scripting (XSS) vulnerability exists in flatpressblog/flatpress version 1.3. When a user uploads a file with a .xsig extension and directly accesses this file the server responds with a Content-type of application/octet-stream leading to the file being processed as an HTML file. This allows an attacker to execute arbitrary JavaScript code which can be used to steal user cookies perform HTTP requests and access content of the same origin.

Reference

https://github.com/flatpressblog/flatpress/commit/3c9cc69364a45fd3f92d4bd606344b5dd1205d6a https://huntr.com/bounties/ed803c13-0858-4c22-93ba-bf2384ab1e9d