Skip to main content

ChallengesSolve security tasks and find flags CVE LabExplore known vulnerabilities CampaignsFollow a security investigation IR LabsPractice incident response LabsExplore hands-on environments

Browse coursesFind a course by topic and level CTF learning pathsFollow guided courses and challenges

EventsJoin scheduled competitions DuelsChallenge another player ArenaPlay team competitions TeamsFind a team and compete together LeaderboardSee player rankings and points

Organizations

Sign In Sign In Register

Sign In Register

Practice ChallengesSolve security tasks and find flags CVE LabExplore known vulnerabilities CampaignsFollow a security investigation IR LabsPractice incident response LabsExplore hands-on environments

Learn Browse coursesFind a course by topic and level CTF learning pathsFollow guided courses and challenges

Compete EventsJoin scheduled competitions DuelsChallenge another player ArenaPlay team competitions TeamsFind a team and compete together LeaderboardSee player rankings and points

Organizations

Challenges / Librarian 9

challenge/librarian-9

Librarian 9

Web

by admin

400

points

2 solves First blood: xx_shock_xx

The most heavily guarded library yet. HTML encoding locks down almost everything. Almost.

Sign in to submit flags.

T43CTF Root Access to Knowledge

About Privacy Terms Responsible Use Cookies

Romania consumer protection: ANPC ANPC · SAL EU ODR Withdrawal & complaints

© 2026 TERMINAL43 S.R.L.

Part of the Terminal43 ecosystem: CTF · System · Code · Hub

cookie_notice: We use essential cookies for authentication and security. With your consent we also set a first-party anonymous cookie to understand which marketing channels bring people here. No third-party tracking, no advertising. Learn more