Stacked

Verified writeups for the Stacked machine of Hack The Box

Stacked

$ tldr Referer XSS → AWS Lambda + LocalStack RCE → custom 0day privesc

·	·
Operating system	Linux
Difficulty	Insane
Vector	Web
IP	10.10.11.112
Retirement date	2022-03-19
Skills	Virtual Hosting Enumeration Referer XSS Injection XSS - Creating JS file (accessing unauthorized resources) Checking/Reading mail through XSS injection AWS Enumeration Lambda Enumeration Creating a Lambda Function (NodeJS) Invoking the created lambda function RCE on LocalStack Abusing FunctionName Parameter (AWS) by exploiting XSS vulnerability (RCE) Finding and exploiting custom 0Day [Privilege Escalation] Root FileSystem Access by abusing Docker

Writeups

Language	Author	Format	Link
🇪🇸 ES	S4vitar	Vídeo	Open
🇬🇧 EN	0xdf	Texto	Open
🇬🇧 EN	IppSec	Vídeo	Open

Skill resources

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

Skill	Source	Link
Subdomain Enumeration	HackTricks	Open
Remote Code Execution (RCE)	HackTricks	Open
Cross-Site Scripting (XSS)	HackTricks	Open
Cross-Site Scripting (XSS)	PortSwigger	Open

Related skills worth mastering

Local File Inclusion (LFI) · Remote File Inclusion (RFI) · Shellshock (CVE-2014-6271) · SQL Injection · Server-Side Request Forgery

If you liked this machine, try

• RedCross — Linux, Medium
• CrossFit — Linux, Insane
• AdmirerToo — Linux, Hard
• Holiday — Linux, Hard
• Schooled — Linux, Medium

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Last updated: 2026-06-07