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Nuclei //

Web App Testingvuln scanner

Community template-powered scanning: thousands of one-click CVE and misconfiguration checks, from a CLI that scales from one target to ten thousand.

difficulty ยท easy
10 min
time to first win
5
guided steps
0
students started here*

HOW TO USE NUCLEI

Follow the steps โ€” click any step card to replay the terminal demo from that point. Everything runs in a lab you control.

nuclei โ€” guided lab session
static view
step 01

First scan

nuclei -u https://lab.target

Templates auto-update โ€” run -update-templates regularly.

step 02

CVE templates only

nuclei -u http://10.0.2.8 -t cves/

Focused folders = less noise, easier learning.

step 03

Feed a whole list

cat hosts.txt | nuclei -t technologies/

Pipes beautifully with subfinder + httpx in recon pipelines.

step 04

Severity filter

nuclei -u http://site -s critical,high

Triage view for sanity during big runs.

step 05

Write your first template

template.yaml: matcher on response body

Custom templates = turn any 'huh' moment into reusable detection.

THE WORKFLOW AT A GLANCE

๐Ÿ“š
Templates
community CVEs
๐ŸŽฏ
Targets
-u/-l or pipe
โšก
Engine
fast engine
๐Ÿท๏ธ
Filter
tags/severity
โœ๏ธ
Custom
your checks
LEARNING CURVE
easy โ€” 10 min to first win

FLAGS & SUPER-MOVES

-u / -lsingle / list targets
-t pathchoose templates
-tags xfilter by tag
-s sevseverity gate
-update-templatesfresh checks
-o filesave findings

PRO TIPS

01

Template monthly churn is huge

Template monthly churn is huge: -update-templates weekly.

02

Bug bounty workflows

Bug bounty workflows: subfinder | httpx | nuclei is the classic pipe.

03

Read 5 templates; YAML format is learnable in an afternoon.

Read 5 templates; YAML format is learnable in an afternoon.

04

Low false-positives beats high volume โ€” severity/tag filtering is your friend.

Low false-positives beats high volume โ€” severity/tag filtering is your friend.

โš–๏ธ

Golden rule

Use Nuclei only on systems you own or have written permission to test. Your lab: Kali + Metasploitable2, DVWA, TryHackMe & HackTheBox โ€” plenty of legal targets, zero risk.

KEEP DIGGING

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โœ๏ธ Author LDM ยท ldmhub4u@gmail.com
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Made for learners, everywhere ยท 2026
*plausibly. verify commands with official docs.