Secret

Verified writeups for the Secret machine of Hack The Box

Secret

$ tldr JWT API forge → core dump leak → root

·	·
Operating system	Linux
Difficulty	Easy
Vector	Web
IP	10.10.11.120
Retirement date	2022-03-26
Skills	Code Analysis Abusing an API Json Web Tokens (JWT) Abusing/Leveraging Core Dump [Privilege Escalation]

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
JSON Web Tokens (JWT)	PortSwigger	Open

If you liked this machine, try

• TheNotebook — Linux, Medium
• Unicode — Linux, Medium
• Backend — Linux, Medium
• BackendTwo — Linux, Medium
• Breadcrumbs — Windows, Hard

---

Comments & tips

Did the official writeup not work? Found a smarter trick? Share it here — comments live in GitHub Discussions.

Last updated: 2026-06-07