Security Research · CTF Writeups · Offensive Notes

Notes from the offensive side.

Writeups, research, and technical notes from a Senior Security Consultant and competitive CTF player based in Singapore.

01
Web Pentesting

CORS Misconfiguration

CORS misconfigurations allow malicious websites to make authenticated cross-origin requests and read the responses — effectively bypassing the Same-Origin Polic…

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04
Web Pentesting

API Pentesting Notes

Modern applications are built on APIs, and APIs introduce their own class of vulnerabilities. This post covers the full API testing methodology from discovery t…

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05
Web Pentesting

Web Cache Poisoning

Web cache poisoning lets you store a malicious response in a cache that gets served to other users. When a CDN or caching proxy serves your poisoned response to…

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06
Web Pentesting

LFI & Path Traversal to RCE

Local File Inclusion looks like a read-only file disclosure bug at first. In practice, with the right chaining techniques, it almost always escalates to Remote …

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09
Mobile / Android

Frida Cheatsheet

Frida is the most powerful tool in the Android pentesting toolkit. This cheatsheet covers everything from basic method hooking to complex native code intercepti…

4 min read →