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cheatsheet-tldr/tldr/flask-unsign
2025-12-18 00:18:39 +00:00

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---
syntax: markdown
tags: [tldr, common]
source: https://github.com/tldr-pages/tldr.git
---
# flask-unsign
> A tool to brute-force, decode, and craft `Flask` session cookies.
> More information: <https://github.com/Paradoxis/Flask-Unsign>.
- Decode a Flask session cookie:
`flask-unsign {{[-d|--decode]}} {{[-c|--cookie]}} {{cookie}}`
- Decode a session cookie fetched from a URL which returns a `Set-Cookie` header:
`flask-unsign {{[-d|--decode]}} --server {{URL}}`
- Brute-force a secret key using the default flask-unsign-wordlist (requires `flask-unsign-wordlist`):
`flask-unsign {{[-u|--unsign]}} {{[-c|--cookie]}} {{cookie}}`
- Brute-force a secret key with a custom wordlist (use `--no-literal-eval` for unquoted entries):
`flask-unsign {{[-u|--unsign]}} {{[-c|--cookie]}} {{cookie}} {{[-w|--wordlist]}} {{path/to/wordlist.txt}}`
- Sign a new session cookie with a secret key:
`flask-unsign {{[-s|--sign]}} {{[-c|--cookie]}} "{{{'logged_in': False}}}" {{[-S|--secret]}} {{secret}}`
- Sign a session cookie using legacy timestamp (useful for old versions):
`flask-unsign {{[-s|--sign]}} {{[-c|--cookie]}} "{{{'logged_in': False}}}" {{[-S|--secret]}} {{secret}} {{[-l|--legacy]}}`
- Brute-force a session cookie with custom threads and no literal evaluation:
`flask-unsign {{[-u|--unsign]}} {{[-c|--cookie]}} {{cookie}} {{[-w|--wordlist]}} {{path/to/wordlist.txt}} {{[-t|--threads]}} {{threads}} {{[-nE|--no-literal-eval]}}`