Most account takeovers do not involve a clever exploit at all. The attacker just knows the password — because the password was never really secret. There are two everyday reasons a password is not secret:
- It is derived from a public fact. A pet's name, a partner's name, a favourite band — often with a trivial twist like replacing
owith0— can be found through open-source intelligence (OSINT): social media, videos, interviews, public profiles. - It is written into the application itself. A default admin login, a "temporary" service password, or a test account gets hardcoded into the source, a config file, a comment, or committed to the repository — where anyone who reads the shipped code can find it.
From the login form, both look identical: a correct email + password is submitted and the server grants a session. There is no injection and no bypass — the credentials are simply right. That is exactly why this class of flaw is so common and so quietly dangerous: every other login defence is intact, and none of it helps.
In this lesson you will:
- Understand why an OSINT-derived password is weak even when it mixes letters and digits.
- Understand why hardcoded and default credentials fail — because the artefact that holds them is readable by the attacker.
- Log in as several NovaCart users without any bypass, by recovering their real passwords from public information and from the application's own source.
- Name where hardcoded credentials are commonly found, and the durable defences.
Estimated time: 10 to 15 minutes.
Note on the target: these challenges run on NovaCart's Login page (/vuln/nebula-login). The exact passwords and public references are version-dependent, so confirm each against your running instance and the current challenge set before attempting — do not assume a value from memory.
When you are ready, send the Continue signal.