> For the complete documentation index, see [llms.txt](https://gitbook-88.gitbook.io/ctf-writeup/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gitbook-88.gitbook.io/ctf-writeup/2020/2020-gyctf.md).

# 2020 GYCTF

- [Blacklist](https://gitbook-88.gitbook.io/ctf-writeup/2020/2020-gyctf/blacklist.md)
- [FlaskApp](https://gitbook-88.gitbook.io/ctf-writeup/2020/2020-gyctf/flaskapp.md)
- [Ezsqli](https://gitbook-88.gitbook.io/ctf-writeup/2020/2020-gyctf/ezsqli.md)