Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add adriannoes/awesome-agentic-ai --skill hunt-xssgit clone --depth 1 https://github.com/adriannoes/awesome-agentic-aiWrote 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/adriannoes/awesome-agentic-ai/hunt-xss)<a href="https://agentmods.dev/skills/adriannoes/awesome-agentic-ai/hunt-xss"><img src="https://agentmods.dev/badge/skills/adriannoes/awesome-agentic-ai/hunt-xss/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/adriannoes/awesome-agentic-ai/hunt-xss"><img src="https://agentmods.dev/badge/skills/adriannoes/awesome-agentic-ai/hunt-xss.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 | $0.00030 | $0.04401 |
| Opus 5 | $0.00015 | $0.02201 |
| Sonnet 5 | $0.00006 | $0.00880 |
| Haiku 4.5 | $0.00003 | $0.00440 |
Grade C, and why
hunt-xss 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 9d 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.
Encoded or obfuscated payloadhighSupply chain
base64 or hex that is decoded and executed hides what actually runs from anyone reading the file.
<svg onload=eval(atob('YWxlcnQoMSk='))> Makes network callslowCapability
Not a fault in itself. Listed so you know the mod talks to something, and to what.
curl -sk "https://target.com/search?q=XSSCANARY" | grep -i "XSSCANARY" How it starts
The opening of the file, as written. The whole thing — 336 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Crown Jewel Targets
XSS is high-value when it combines privileged context + persistent delivery + scope escalation. The highest payouts come from:
- Admin panels and authenticated dashboards (e.g.,
*/admin,*/settings) — attacker can hijack sessions with elevated privileges, exfiltrate tokens, or pivot to account takeover - Payment/financial flows (
paypal.com, checkout pages, currency converters) — XSS here enables credential harvesting and financial fraud at scale - Stored XSS in collaborative features (wikis, markdown renderers, issue trackers, RDoc, labels, tags) — one payload infects every viewer, multiplying impact
- SSO/signin pages (e.g.,
paypal.com/signin) — XSS here is critical because it can steal auth tokens across the entire platform - Shared SaaS tenant surfaces (
*.myshopify.com,api.collabs.*) — XSS in one tenant's context can bleed across tenant boundaries - Help/documentation sites (
help.shopify.com) — lower severity individually, but often have looser sanitization and trusted user perception - SVG/file upload endpoints — frequently bypasses CSP and sanitization simultaneously
Asset types that pay most: Main product domains > Admin subdomains > API endpoints > Marketing/help sites
OOB-Or-It-Didn't-Happen Gate (Blind / Stored XSS)
For blind and stored XSS — claims require an out-of-band confirmation, the same as blind SSRF. The OOB receiver fires when the payload actually executes in a browser somewhere (an admin reviewing logs, a SOC analyst opening a ticket, an email rendering a stored payload).
What is NOT confirmation
- ASP.NET request validator rejected your
<and returned a different status code → not XSS, that's WAF noise. - Your payload appears in the response body URL-encoded or HTML-encoded → not XSS, that's correct output encoding.
- The form action attribute contains your payload string as
%22onclick%3D…→ not XSS, the browser does NOT decode URL encoding inside HTML attribute values; the%22stays as literal%22in the DOM. - Your
<script>tag appears in the response as<script>→ not XSS, that's escaping.
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.
- 9d ago First seen · 336 lines · 30 tokens per session scan C 2b8a98d7560b
hunt-xss is a skill published in the GitHub repository adriannoes/awesome-agentic-ai (57 stars, last pushed 14d ago), licensed MIT. It adds 30 tokens to every session and 4,401 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it C with 2 findings (encoded or obfuscated payload, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-03.
Other skills, from other repositories
von-restorff-effect
Apply the Von Restorff Effect — the element that differs from its neighbours is the one remembered. Use when a single action must dominate. For overall ordering rather than single-element emphasis, use visual-hierarchy.
handoff-spec
Write the implementation handoff — measurements, behaviours, assets, states, and edge cases. Use when engineering picks up the work. For verifying the result afterwards use design-qa-checklist; for reusable library components use component-spec (design-systems).
animation-principles
Apply animation principles — easing, staging, follow-through — to one specific UI motion. Use when tuning how an animation feels. For product-wide duration and easing tokens use motion-system (design-systems); for a full interaction spec use micro-interaction-spec.
dark-mode-design
Adapt an existing palette to dark mode — surface elevation, contrast rebalancing, and desaturation rules. Use when you already have a light palette to translate. For building the base palette first, use color-system.
responsive-design
Design layouts and interactions that adapt across screen sizes and input methods. Use when one design must serve many viewports. For the underlying column grid use layout-grid; for OS-specific patterns use platform-conventions.
spacing-system
Create a spacing scale from a base unit with rules for when each step applies. Use when standardising padding and margins. For page-level columns and gutters, use layout-grid.