CVE-2026-82543

FileCodeBox before version 2.4 has a rate-limit bypass vulnerability in the IPRateLimit class. An unauthenticated attacker can supply controlled X-Real-IP and X-Forwarded-For headers without trusted reverse proxy verification, allowing enumeration of share codes and retrieval of other users' files.

A vulnerability in the IPRateLimit implementation of FileCodeBox up to 2.2 allows remote attackers to bypass IP-based rate limit protection and failed attempt restrictions by faking X-Real-IP and X-Forwarded-For HTTP headers. This can enable attackers to perform DoS attacks or brute force share codes.

A stored cross-site scripting (XSS) vulnerability is found in the text sharing feature of FileCodeBox version 2.2 and earlier. Insufficient input validation allows attackers to inject arbitrary JavaScript code into shared text "codeboxes". The XSS payload is automatically executed in the browsers of users who access the infected codebox.

A path traversal vulnerability in FileCodeBox v2.2 and earlier allows arbitrary file writes when the application is configured to use local filesystem storage. The SystemFileStorage.save_file method in core/storage.py uses user-supplied filenames without validation to construct save_path, allowing remote attackers to write files outside the intended directory via crafted POST requests to the /share/file/ upload endpoint, which requires no authorization.