Security Research Notes https://goldleo.cc/blog Some random thoughts on security and computers. en LINE CTF 2025 Level-Up Write-up https://goldleo.cc/blog/line-ctf-2025-level-up https://goldleo.cc/blog/line-ctf-2025-level-up Sun, 19 Oct 2025 00:00:00 GMT Web A write-up for Level-Up, the LINE CTF 2025 web challenge that chains an open redirect, a LevelDB prefix trick and frame counting.