Proving Grounds Writeups

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Easy Linux

CyberSploit1 Writeup - Proving Grounds

Easy Linux box leaking a username in an HTML comment and a base64-encoded password in robots.txt, used to SSH in as itsskv, then escalating to root with the overlayfs kernel exploit on an outdated 3.13 kernel.

privilege-escalation kernel-exploit information-disclosure base64

The Husky Hacker • Oct 6, 2026 • 2 min read

Easy Linux

Exfiltrated Writeup - Proving Grounds

Linux box rooted via SQLi authentication bypass in Subrion CMS, exploiting a file upload vulnerability to gain RCE, then leveraging a cronjob for privilege escalation.

sql-injection file-upload authentication-bypass privilege-escalation +4

Joshua • Feb 23, 2026 • 3 min read

Other platforms

HackTheBox 92 TryHackMe 10 All writeups