جزئیات آسیب‌پذیری

Flare is a Next.js-based, self-hostable file sharing platform that integrates with screenshot tools. Prior to 1.7.3, an authenticated path traversal vulnerability in /api/avatars/[filename] allows any logged-in user to read arbitrary files from within the application container. The filename URL parameter is passed to path.join() without sanitization, and getFileStream() performs no path validation, enabling %2F-encoded ../ sequences to escape the uploads/avatars/ directory and read any file accessible to the nextjs process under /app/. Authentication is enforced by Next.js middleware. However, on instances with open registration enabled (the default), any attacker can self-register and immediately exploit this. This vulnerability is fixed in 1.7.3.

• https://github.com/FlintSH/Flare/security/advisories/GHSA-h639-p7m9-mpgp x_refsource_CONFIRM
• https://github.com/FlintSH/Flare/commit/cd894cc480619aef958be5de72b1445222fd8d36 x_refsource_MISC
• https://github.com/FlintSH/Flare/releases/tag/v1.7.3 x_refsource_MISC