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…

3 min read
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…

4 min read
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…

3 min read
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 …

3 min read
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