SSTI (Server-Side Template Injection)

Cross-platform resources for SSTI (Server-Side Template Injection): curated HTB machines, PortSwigger labs and TryHackMe rooms with validated writeups and related skills.

This page aggregates cross-platform resources to practice SSTI (Server-Side Template Injection): retired Hack The Box machines, PortSwigger Web Security Academy labs and TryHackMe rooms, plus curated resources (HackTricks, PortSwigger, etc.) and related skills.

Coverage: 24 challenges across 3 platforms — 12 HackTheBox · 7 PortSwigger · 5 TryHackMe. 12 with a Spanish writeup, 12 with a video writeup.

Where to start

Ordered by actual difficulty. At the same level: isolated lab first, then the guided room, and the full machine last.

1. PortSwigger — Server-side template injection in a sandboxed environment (Apprentice) · 🇬🇧
2. PortSwigger — Server-side template injection with a custom exploit (Apprentice) · 🇬🇧
3. TryHackMe — OWASP Top 10 2025: Insecure Data Handling (Easy · ~30 min) · 🇬🇧
4. HackTheBox — Doctor (Fácil) · 🇪🇸 🇬🇧 📹
5. HackTheBox — GoodGames (Fácil) · 🇪🇸 🇬🇧 📹
6. HackTheBox — Late (Fácil) · 🇪🇸 🇬🇧 📹

Curated resources

Source	Link
PortSwigger	https://portswigger.net/web-security/server-side-template-injection

HTB machines practicing SSTI (Server-Side Template Injection) (12)

Machine	OS	Difficulty	Writeup
Anubis	Windows	INSANE	🇪🇸 🇬🇧 📹
Bolt	Linux	MEDIUM	🇪🇸 🇬🇧 📹
Catch	Linux	MEDIUM	🇪🇸 🇬🇧 📹
Doctor	Linux	EASY	🇪🇸 🇬🇧 📹
Epsilon	Linux	MEDIUM	🇪🇸 🇬🇧 📹
Flustered	Linux	MEDIUM	🇪🇸 🇬🇧 📹
GoodGames	Linux	EASY	🇪🇸 🇬🇧 📹
Hancliffe	Windows	HARD	🇪🇸 🇬🇧 📹
Late	Linux	EASY	🇪🇸 🇬🇧 📹
Noter	Linux	MEDIUM	🇪🇸 🇬🇧 📹
NunChucks	Linux	EASY	🇪🇸 🇬🇧 📹
Oz	Linux	HARD	🇪🇸 🇬🇧 📹

PortSwigger labs practicing SSTI (Server-Side Template Injection) (7)

Lab	Difficulty	Topic	Official
Server-side template injection in a sandboxed environment	APPRENTICE	Server-Side Template Injection (SSTI)	Open
Server-side template injection with a custom exploit	APPRENTICE	Server-Side Template Injection (SSTI)	Open
Basic server-side template injection	PRACTITIONER	Server-Side Template Injection (SSTI)	Open
Basic server-side template injection (code context)	PRACTITIONER	Server-Side Template Injection (SSTI)	Open
Server-side template injection in an unknown language with a documented exploit	PRACTITIONER	Server-Side Template Injection (SSTI)	Open
Server-side template injection using documentation	PRACTITIONER	Server-Side Template Injection (SSTI)	Open
Server-side template injection with information disclosure via user-supplied objects	PRACTITIONER	Server-Side Template Injection (SSTI)	Open

TryHackMe rooms practicing SSTI (Server-Side Template Injection) (5)

Room	Difficulty	Type	Access	Official
OWASP Top 10 2025: Insecure Data Handling	EASY	Walkthrough	🟢 Free	Open
Hip Flask	MEDIUM	Walkthrough	🟢 Free	Open
NoNameCTF	MEDIUM	Challenge	🔵 VIP	Open
Server-side Template Injection	MEDIUM	Walkthrough	🔵 VIP	Open
SSTI	MEDIUM	Walkthrough	🟢 Free	Open

Related skills

• /en/skills/rce

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Last updated: 2026-08-17