Validation

Verified writeups for the Validation machine of Hack The Box

Validation

$ tldr SQLi error + INTO OUTFILE → PHP webshell → root

·	·
Operating system	Linux
Difficulty	Easy
Vector	Web
IP	10.10.11.116
Retirement date	2021-09-14
Skills	SQLI (Error Based) SQLI -> RCE (INTO OUTFILE) Information Leakage

Writeups

Language	Author	Format	Link
🇪🇸 ES	S4vitar	Vídeo	Open
🇪🇸 ES	El Pingüino de Mario	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
Information Leakage	HackTricks	Open
SQL Injection	HackTricks	Open
SQL Injection	PortSwigger	Open
Remote Code Execution (RCE)	HackTricks	Open

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

• Catch — Linux, Medium
• Zetta — Linux, Hard
• Frolic — Linux, Easy
• Europa — Linux, Medium
• Seal — Linux, Medium

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Comments & tips

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Last updated: 2026-06-07