> ## Documentation Index
> Fetch the complete documentation index at: https://rootea.es/llms.txt
> Use this file to discover all available pages before exploring further.

# TheNotebook

> Verified writeups for the TheNotebook machine of Hack The Box

# TheNotebook

<p className="machine-summary"><span className="prompt"><code>\$ tldr</code></span> JWT escalation + file upload → Docker RUNC (CVE-2019-5736)</p>

<div className="cve-row"><span className="cve-row-label">CVE / Bulletins:</span> <a className="cve-chip" href="https://nvd.nist.gov/vuln/detail/CVE-2019-5736" target="_blank" rel="noopener">CVE-2019-5736 ↗</a></div>

<div className="machine-meta">
  | ·                | ·                                                                                                                   |
  | ---------------- | ------------------------------------------------------------------------------------------------------------------- |
  | Operating system | Linux                                                                                                               |
  | Difficulty       | Medium                                                                                                              |
  | Vector           | <span className="vbadge vbadge-web">Web</span>                                                                      |
  | IP               | `10.10.10.230`                                                                                                      |
  | Retirement date  | 2021-07-31                                                                                                          |
  | Skills           | Abusing JWT (Gaining privileges) Abusing Upload File Docker Breakout \[CVE-2019-5736 - RUNC] (Privilege Escalation) |
</div>

## Writeups

| Language | Author      | Format | Link                                                           |
| -------- | ----------- | ------ | -------------------------------------------------------------- |
| 🇪🇸 ES  | **S4vitar** | Vídeo  | [Open](https://www.youtube.com/watch?v=dekA2dzLSlE)            |
| 🇬🇧 EN  | **0xdf**    | Texto  | [Open](https://0xdf.gitlab.io/2021/07/31/htb-thenotebook.html) |
| 🇬🇧 EN  | **IppSec**  | Vídeo  | [Open](https://www.youtube.com/watch?v=S4FrlMTY0GY)            |

## Skill resources

Curated documentation for each technique listed in the *Skills* column above. Sources: HackTricks, GTFOBins, PortSwigger, etc.

| Skill                       | Source      | Link                                                     |
| --------------------------- | ----------- | -------------------------------------------------------- |
| File Upload Vulnerabilities | PortSwigger | [Open](https://portswigger.net/web-security/file-upload) |
| JSON Web Tokens (JWT)       | PortSwigger | [Open](https://portswigger.net/web-security/jwt)         |

## Related skills worth mastering

Remote Code Execution (RCE)

## If you liked this machine, try

* [Secret](/en/htb/machines/linux/facil/secret) — Linux, Easy
* [Silo](/en/htb/machines/windows/medio/silo) — Windows, Medium
* [Timing](/en/htb/machines/linux/medio/timing) — Linux, Medium
* [Unicode](/en/htb/machines/linux/medio/unicode) — Linux, Medium
* [Blunder](/en/htb/machines/linux/facil/blunder) — Linux, Easy

***

## Comments & tips

Did the official writeup not work? Found a smarter trick? Share it here — comments live in [GitHub Discussions](https://github.com/FFuson/HTB_Writeups/discussions).

<div className="rootea-giscus-wrap" data-giscus-term="machine:thenotebook" data-giscus-lang="en" />

*Last updated: 2026-06-07*

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