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

# Cache

> Verified writeups for the Cache machine of Hack The Box

# Cache

<p className="machine-summary"><span className="prompt"><code>\$ tldr</code></span> OpenEMR auth bypass + SQLi RCE → docker group privesc</p>

<div className="machine-meta">
  | ·                | ·                                                                                                                                                                                                                                                          |
  | ---------------- | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
  | Operating system | Linux                                                                                                                                                                                                                                                      |
  | Difficulty       | Medium                                                                                                                                                                                                                                                     |
  | Vector           | <span className="vbadge vbadge-web">Web</span>                                                                                                                                                                                                             |
  | IP               | `10.10.10.188`                                                                                                                                                                                                                                             |
  | Retirement date  | 2020-10-10                                                                                                                                                                                                                                                 |
  | Skills           | Information Leakage (Code Inspection) Abusing OpenEMR Broken Access Control Authentication Bypassing (Abusing the registration panel) SQL Injection - Error Based \[SQLI] OpenEMR Authentication Exploit (RCE) Abusing Docker Group (Privilege Escalation) |
</div>

## Writeups

| Language | Author      | Format | Link                                                     |
| -------- | ----------- | ------ | -------------------------------------------------------- |
| 🇪🇸 ES  | **S4vitar** | Vídeo  | [Open](https://www.youtube.com/watch?v=C0zJUGM00mc)      |
| 🇬🇧 EN  | **0xdf**    | Texto  | [Open](https://0xdf.gitlab.io/2020/10/10/htb-cache.html) |
| 🇬🇧 EN  | **IppSec**  | Vídeo  | [Open](https://www.youtube.com/watch?v=kfLU5-Eeyhw)      |

## Skill resources

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

| Skill                          | Source      | Link                                                                            |
| ------------------------------ | ----------- | ------------------------------------------------------------------------------- |
| Access Control / IDOR          | PortSwigger | [Open](https://portswigger.net/web-security/access-control)                     |
| Authentication Vulnerabilities | PortSwigger | [Open](https://portswigger.net/web-security/authentication)                     |
| Information Leakage            | HackTricks  | [Open](https://book.hacktricks.wiki/en/pentesting-web/information-leak.html)    |
| SQL Injection                  | HackTricks  | [Open](https://book.hacktricks.wiki/en/pentesting-web/sql-injection/index.html) |
| SQL Injection                  | PortSwigger | [Open](https://portswigger.net/web-security/sql-injection)                      |
| Remote Code Execution (RCE)    | HackTricks  | [Open](https://book.hacktricks.wiki/en/pentesting-web/command-injection.html)   |

## Related skills worth mastering

Cross-Site Scripting (XSS) · Local File Inclusion (LFI) · Remote File Inclusion (RFI) · Shellshock (CVE-2014-6271)

## If you liked this machine, try

* [Validation](/en/htb/machines/linux/facil/validation) — Linux, Easy
* [Catch](/en/htb/machines/linux/medio/catch) — Linux, Medium
* [Zetta](/en/htb/machines/linux/dificil/zetta) — Linux, Hard
* [Europa](/en/htb/machines/linux/medio/europa) — Linux, Medium
* [Seal](/en/htb/machines/linux/medio/seal) — Linux, Medium

***

## 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:cache" data-giscus-lang="en" />

*Last updated: 2026-06-07*

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