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/akashrpatil/awesome-offensive-security-skillsnpx agentmods add skills/akashrpatil/awesome-offensive-security-skills/oauthWrote 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/akashrpatil/awesome-offensive-security-skills/oauth)<a href="https://agentmods.dev/skills/akashrpatil/awesome-offensive-security-skills/oauth"><img src="https://agentmods.dev/badge/skills/akashrpatil/awesome-offensive-security-skills/oauth/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/akashrpatil/awesome-offensive-security-skills/oauth"><img src="https://agentmods.dev/badge/skills/akashrpatil/awesome-offensive-security-skills/oauth.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 | $0.01001 |
| Opus 5.5 | $0.00010 | $0.00400 |
| Sonnet 5.5 | $0.00005 | $0.00200 |
| Haiku 4.5 | $0.00003 | $0.00100 |
Grade C, and why
OAuth Authentication — Deep Dive scanned grade C with 2 findings 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.
Cloud metadata endpointhighServer-side request forgery
One request to 169.254.169.254 can return temporary IAM credentials.
Register OAuth client with `logo_uri` pointing to metadata endpoint: `http://169.254.169.254/...` 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] This is a copy
83% identical to Access Control — Complete Deep Dive — 79 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.
How it starts
The opening of the file, as written. The whole thing — 122 lines — stays where its author put it; the contents beside it link to each section on GitHub.
OAuth Authentication — 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: Implicit flow bypass 🟡 PRACTITIONER
Intercept token response, change email/sub to victim's → authenticate as victim.
Lab 2: SSRF via OpenID registration 🟡 PRACTITIONER
Register OAuth client with logo_uri pointing to metadata endpoint: http://169.254.169.254/...
Lab 3: Forced profile linking 🟡 PRACTITIONER
Missing state parameter → CSRF attach your OAuth to victim's account.
Lab 4: Account hijack via redirect_uri 🟡 PRACTITIONER
redirect_uri=https://EXPLOIT-SERVER
Steal OAuth code, exchange for victim's access token.
Lab 5: Token theft via open redirect 🟡 PRACTITIONER
redirect_uri=https://TARGET/oauth-callback/../post/next?path=https://EXPLOIT-SERVER/
Chain open redirect to steal implicit flow tokens via Referer.
Lab 6: Token theft via proxy page 🔴 EXPERT
Find page that sends Referer with token to attacker-controllable iframe source.
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:
- Identify the filter/WAF
- Fuzz with Burp Intruder custom wordlists
- Search GitHub/Twitter for new bypasses
- Chain with other vulns for escalation
- Try encoding variants: URL, double-URL, unicode, hex
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 · 122 lines · 25 tokens per session scan C 5ae84a722df5
OAuth Authentication — Deep Dive is a skill published in the GitHub repository akashrpatil/awesome-offensive-security-skills (11 stars, last pushed 6mo ago), licensed Apache-2.0. It adds 25 tokens to every session and 1,001 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it C with 2 findings (cloud metadata endpoint, makes network calls). It is 83% identical to Access Control — Complete Deep Dive, differing in 79 lines, and is treated as a copy.
Other skills, from other repositories
Authentication — Complete Deep Dive
Complete PortSwigger deep-dive with exact payloads for every lab variant including zero-day techniques.
Access Control — Complete Deep Dive
Complete PortSwigger deep-dive with exact payloads for every lab variant including zero-day techniques.
CORS Misconfiguration — Complete Deep Dive
Complete PortSwigger deep-dive with exact payloads for every lab variant including zero-day techniques.
DOM-based Vulnerabilities — Complete Deep Dive
Complete PortSwigger deep-dive with exact payloads for every lab variant including zero-day techniques.
HTTP Host Header Attacks — Deep Dive
Complete PortSwigger deep-dive with exact payloads for every lab variant including zero-day techniques.
JWT Authentication — Complete Deep Dive
Complete PortSwigger deep-dive with exact payloads for every lab variant including zero-day techniques.