Lychee is a free photo-management tool. In versions starting from 6.6.6 to before 6.6.10, an attacker can leak local files including environment variables, nginx logs, other user's uploaded images, and configuration secrets due to a path traversal exploit in SecurePathController.php. This issue has been patched in version 6.6.10.
https://github.com/LycheeOrg/Lychee/security/advisories/GHSA-6rj9-gm78-vhf9
https://github.com/LycheeOrg/Lychee/commit/ae7270b7b47e4a284ea1f69d260e52d592711072