data-exfil SKILL.md skillF
data-exfil 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/data-exfil@git:20260529.8f6ea0ePins git:20260529.8f6ea0e in mdr.lock. Pin the fingerprint instead.
- Audit grade
- F, 14 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- dreadnode/capabilities
- Path
capabilities/web-security/skills/data-exfil/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260529.8f6ea0e, committed May 29, 2026
- First version recorded
- May 4, 2026
- Size
- 16,183 bytes
- Repository stars
- 22
- License
- MIT
AI/LLM data exfiltration techniques via rendered markdown, HTML-in-markdown, tool artifacts, domain encoding, and url_safe bypasses. Use when crafting exfil payloads for AI red teaming, analyzing AI app rendering pipelines for exfil surfaces, bypassing URL filters/sanitizers, or reviewing AI-generated output for exfil risk.
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
# AI Data Exfiltration Techniques Techniques for exfiltrating data from AI/LLM applications through rendered output. The attack: instruct the model to embed stolen data (PII, system prompts, conversation history) into rendered elements that fire HTTP requests to attacker infrastructure. **Callback target used in all examples:** First call `get_callback_url`, then substitute the returned value anywhere this skill shows `<OOB-DOMAIN>` or `<CALLBACK_URL>`. ## When to Use - Crafting exfil payloads during AI red teaming engagements - Analyzing AI app rendering pipelines for exfil surfaces - Bypassing `url_safe` or URL sanitization filters - Assessing whether an AI app is vulnerable to indirect prompt injection with data exfil - Building PoCs for bug bounty reports involving AI/LLM targets ## When NOT to Use - Target is not an AI/LLM application - No rendering pipeline exists (pure API, no markdown/HTML output) - Testing non-exfil attack classes (use appropriate skill instead) ## Rationalizations to Reject …
Read the whole file at its exact version.
How to install
mdr add dreadnode/capabilities/data-exfil@sha256:a2a501290eb6b910The line at the top of this page pins the label git:20260529.8f6ea0e, 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_bnlwu3stcplcpg6y)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between May 4, 2026 and May 29, 2026, about one every 25 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260529.8f6ea0e latest | 2026-05-29 | 8f6ea0e | 16,183 B | F | view · diff |
| git:20260504.2a64374 | 2026-05-04 | 2a64374 | 16,206 B | F | view |
Audit of the latest version
- FAIL, critical: No text hidden with inline styles (matched: style="display:none)
- fail: No link to a raw IP address (matched: http://104.21.10.55)
- 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 (16183 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 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
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_bnlwu3stcplcpg6y GET https://markdownregistry.com/api/v1/resolve?ref=dreadnode/capabilities/data-exfil GET https://markdownregistry.com/api/v1/blob/a2a501290eb6b910ce3460e0f2290eb1e99021c9f0ec3f7051e88fadfaec5c8f
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.
More from dreadnode/capabilities
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