HackSkills is an organized knowledge base of installable skills that gives AI agents practical security knowledge across areas such as web security, privilege escalation, reverse engineering, and digital forensics. It is intended for bug bounty work, penetration testing, CTF competitions, and authorized security research. The catalogue entries are the project's own master, category, and topic skills.
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/yaklang/hack-skillsnpx agentmods add skills/yaklang/hack-skills/csp-bypass-advancedWrote 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/yaklang/hack-skills/csp-bypass-advanced)<a href="https://agentmods.dev/skills/yaklang/hack-skills/csp-bypass-advanced"><img src="https://agentmods.dev/badge/skills/yaklang/hack-skills/csp-bypass-advanced/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/yaklang/hack-skills/csp-bypass-advanced"><img src="https://agentmods.dev/badge/skills/yaklang/hack-skills/csp-bypass-advanced.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket warn
- Snyk fail
- NVIDIA SkillSpector warn
SkillSpector: 3 findings, up to high
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- high YARA Match · line 3 YARA rule matched a hack tool or exploit indicator (offensive tools, reconnaissance, privilege escalation, or exploit frameworks).Fix: Remove offensive tool references and exploit code. Legitimate agent skills should not contain penetration testing tools, exploit frameworks, or reconnaissance utilities.
- high Prompt Injection · line 115 Hidden instructions were detected in comments or invisible text. These could contain malicious directives. Manual review is recommended.Fix: Audit all comments and invisible characters. Remove any instructions that direct the agent to perform unauthorized actions. Use plain, reviewable content.
- medium Excessive Agency · line 11 Skill enables autonomous high-impact decisions without human-in-the-loop verification. Critical operations (destructive commands, financial transactions, data deletion) should require explicit user confirmation.Fix: Add human-in-the-loop confirmation for destructive, irreversible, or high-impact operations. Never auto-execute commands that modify files, send data, or alter system state.
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 | $0.00052 | $0.03228 |
| Opus 5 | $0.00026 | $0.01614 |
| Sonnet 5 | $0.00010 | $0.00646 |
| Haiku 4.5 | $0.00005 | $0.00323 |
Grade A, and why
csp-bypass-advanced scanned grade A with 0 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 10d 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
Copies of this mod
4 near-identical copies found in the catalogue:
- csp-bypass-advanced — 100% identical, 0 lines differ
- csp-bypass-advanced — 100% identical, 0 lines differ
- csp-bypass-advanced — 100% identical, 2 lines differ
- csp-bypass-advanced — 97% identical, 6 lines differ
How it starts
The opening of the file, as written. The whole thing — 260 lines — stays where its author put it; the contents beside it link to each section on GitHub.
SKILL: CSP Bypass — Advanced Techniques
AI LOAD INSTRUCTION: Covers per-directive bypass techniques, nonce/hash abuse, trusted CDN exploitation, data exfiltration despite CSP, and framework-specific bypasses. Base models often suggest
unsafe-inlinebypass without checking if the CSP actually uses it, or miss the criticalbase-uriandobject-srcgaps.
0. RELATED ROUTING
- xss-cross-site-scripting for XSS vectors to deliver after CSP bypass
- dangling-markup-injection when CSP blocks scripts but HTML injection exists — exfiltrate without JS
- crlf-injection when CRLF can inject CSP header or steal nonce via response splitting
- waf-bypass-techniques when both WAF and CSP must be bypassed
- clickjacking when CSP lacks
frame-ancestors— clickjacking still possible
1. CSP DIRECTIVE REFERENCE MATRIX
| Directive | Controls | Default Fallback |
|---|---|---|
default-src |
Fallback for all -src directives not explicitly set |
None (browser default: allow all) |
script-src |
JavaScript execution | default-src |
style-src |
CSS loading | default-src |
img-src |
Image loading | default-src |
connect-src |
XHR, fetch, WebSocket, EventSource | default-src |
frame-src |
iframe/frame sources | default-src |
font-src |
Font loading | default-src |
object-src |
<object>, <embed>, <applet> |
default-src |
media-src |
<audio>, <video> |
default-src |
base-uri |
<base> element |
No fallback — unrestricted if absent |
form-action |
Form submission targets | No fallback — unrestricted if absent |
frame-ancestors |
Who can embed this page (replaces X-Frame-Options) | No fallback — unrestricted if absent |
report-uri / report-to |
Where violation reports are sent | N/A |
navigate-to |
Navigation targets (limited browser support) | No fallback |
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.
- 10d ago First seen · 260 lines · 52 tokens per session scan A 55bf3a08e10f
csp-bypass-advanced is a skill published in the GitHub repository yaklang/hack-skills (2,143 stars, last pushed 2mo ago), licensed MIT. It adds 52 tokens to every session and 3,228 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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