2025weight 24.76QnQSec
QnQSec CTF 2025
3 challenges with 3 published community solutions between them. Solution links go to CTFtime’s task page, which aggregates every writeup for a challenge - individual blog posts rot, the aggregator does not.
Full task list on CTFtimeWeb2
Reach data or functionality the application meant to keep from you - through its inputs, its tokens, or its trust in the client.
Solve it with:JWT decoder and signature verifierJWT alg=none bypass generatorWeb attack payload catalogJWT secret brute forceLearn: Web attacks and session tokens
- web
- qnqsec
- ssti
- nginx
- flask
- rce
Same technique in picoCTF: Bithug, Startup Company, SSTI2
- qnqsec
- web
- idor
- broken_access_control
Same technique in picoCTF: Client-side-again, dont-use-client-side, Irish-Name-Repo 3
Forensics1
Recover something from a file, a capture, or a disk image - often from a part of it the format says is unused.
Solve it with:File type identifier by magic bytesMagic byte and file signature tablePCAP analyzer for CTF network forensicsEXIF metadata viewerLearn: File forensics and carvingLearn: Network forensics
- forensic
Same technique in picoCTF: FindAndOpen, c0rrupt, extensions