Getting it into your agent
It runs from inside its repository, so the clone comes first — what it calls does not travel with the file alone.
git clone --depth 1 https://github.com/ShulkwiSEC/bb-hugenpx agentmods add skills/shulkwisec/bb-huge/authenticationWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/shulkwisec/bb-huge/authentication)<a href="https://agentmods.dev/skills/shulkwisec/bb-huge/authentication"><img src="https://agentmods.dev/badge/skills/shulkwisec/bb-huge/authentication/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/shulkwisec/bb-huge/authentication"><img src="https://agentmods.dev/badge/skills/shulkwisec/bb-huge/authentication.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00025 | $0.01439 |
| Opus 5.5 | $0.00010 | $0.00576 |
| Sonnet 5.5 | $0.00005 | $0.00288 |
| Haiku 4.5 | $0.00003 | $0.00144 |
Grade A, and why
Authentication — Complete Deep Dive scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
tools: [burp-suite, curl, sqlmap, ffuf, python, hashcat, ysoserial] Copies of this mod
1 near-identical copy found in the catalogue:
- Authentication — Complete Deep Dive — 100% identical, 0 lines differ
How it starts
The opening of the file, as written. The whole thing — 168 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Authentication — Complete 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: Username enum different responses 🟢 APPRENTICE
Burp Intruder with username wordlist. Check response length/content difference: Invalid username vs Incorrect password.
Lab 2: 2FA simple bypass 🟢 APPRENTICE
After login, skip /login2 (2FA page) and navigate directly to /my-account.
Lab 3: Password reset broken logic 🟢 APPRENTICE
POST /forgot-password?temp-forgot-password-token=TOKEN HTTP/1.1
temp-forgot-password-token=TOKEN&username=carlos&new-password-1=hacked&new-password-2=hacked
Change username to victim. Token validation doesn't check user ownership.
Lab 4: Subtly different responses 🟡 PRACTITIONER
Check for trailing period: Invalid username or password vs Invalid username or password.
Lab 5: Response timing 🟡 PRACTITIONER
Long password → longer response time for valid usernames (bcrypt hash computed). Use X-Forwarded-For: 1.1.1.§1§ to bypass IP lock.
Lab 6: Broken brute-force IP block 🟡 PRACTITIONER
Login with valid creds every 2 attempts to reset the IP counter. Alternate: valid→attack→valid→attack.
Lab 7: Username enum via account lock 🟡 PRACTITIONER
Locked account = account exists. Send 5 attempts for each username. Locked response = valid user.
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 1mo ago First seen · 168 lines · 25 tokens per session scan A f58b2f397942
Authentication — Complete Deep Dive is a skill published in the GitHub repository ShulkwiSEC/bb-huge (23 stars, last pushed 3mo ago), licensed MIT. It adds 25 tokens to every session and 1,439 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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