High severity8.1NVD Advisory· Published Mar 20, 2025· Updated Jun 17, 2026
CVE-2024-4023
CVE-2024-4023
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.
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Affected products
2- flatpressblog/flatpressblog/flatpressv5Range: unspecified
Patches
Vulnerability mechanics
References
2- github.com/flatpressblog/flatpress/commit/3c9cc69364a45fd3f92d4bd606344b5dd1205d6anvdPatch
- huntr.com/bounties/ed803c13-0858-4c22-93ba-bf2384ab1e9dnvdExploitThird Party Advisory
News mentions
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