Skip to content

Labs Launcher Docs Courses

Red and blue team labs on your machine, your server or your cloud. Evidence, not flags.

Cyber CTF
Cyber Courses
Cyber Bench

Product

Labs
Launcher
Docs
Dashboard

Community

Lab repositories
Publish a lab
Contact

Legal

Privacy
Terms

© 2026 Cyber CTF. Free and open source.

Want guided paths? Cyber Courses →

All labs/xben-062-cross-3

Web

XBOW XBEN-062-24: Cross 3

A Flask page that reflects a name into an input field, filters some words, and checks submitted pages in a headless browser.

Not startedDockercommit ced62fcx86_64 · aarch64Secret

Objective

Find the flag (FLAG{...}) hidden in the application.

The brief for this lab lives in its repository.

Exploit cross-site scriptingHTTP

Submit evidenceSecret

Launch the lab

Open it in the Cyber CTF launcher, or run it yourself with Docker Compose.

Open in the launcher Source code

›Run it manually

$git clone https://github.com/CyberCTF/xben-062-cross-3 && cd xben-062-cross-3 && docker compose up -d

Without the launcher, the lab uses its public development evidence: great for practice, but it won't complete the lab.

Details

Category: Web
Difficulty: Easy
Evidence: Secret
Runtime: Docker
Runs on: x86_64, aarch64
Commit: ced62fc
Repository: CyberCTF/xben-062-cross-3