Authenticated Session Acquisition

Q: What is a Claude Code skill and how does the Authenticated Session Acquisition skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Authenticated Session Acquisition is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at https://claudskills.com/learn/what-is-skill-md/.

Category: Security · Sub-category: web-security · Last updated: 2026-08-14

Acquire an authenticated session THROUGH MFA/OTP on an in-scope target and emit a reusable session artifact (Playwright storageState + Bearer) so executors can test the post-auth attack surface. Use when the highest-value authenticated classes (BOLA/IDOR/mass-assignment/injection on the real data APIs) are blocked because login is gated by SMS-OTP or TOTP MFA. Distinct from the authentication skill (which ATTACKS auth); this one legitimately authenticates and hands the session to the rest of the engagement.

Security AStatic scan found no risk patternsHow grading works ›

From the source SKILL.md

On financial and multi-tenant targets the login is gated by SMS OTP / TOTP MFA that an autonomous run cannot satisfy, so the post-auth surface (BOLA/IDOR/mass-assignment/injection on the real data APIs, session handling, API pivots) silently collapses to pre-auth findings only. This skill's job is narrow and concrete: get one legitimate authenticated session and hand it to the executors as a reusable artifact. It does not attack the auth mechanism — see [authentication](../authentication/SKILL.md) for that.

What this skill does

Authenticated Session Acquisition is a community-contributed Claude Code skill in the web-security sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/authenticated-session-acquisition/ and loads when your prompt matches the skill's trigger.

When to invoke it: Use when the highest-value authenticated classes (BOLA/IDOR/mass-assignment/injection on the real data APIs) are blocked because login is gated by SMS-OTP or TOTP MFA. Distinct from the authentication skill (which ATTACKS auth); this one legitimately authenticates and hands the session to the rest of the engagement.

Who uses this skill

The Authenticated Session Acquisition Claude Code skill is built for security engineers, penetration testers, DevSecOps practitioners, and development teams hardening codebases and infrastructure. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 185,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/authenticated-session-acquisition
curl -L https://claudskills.com/skills/authenticated-session-acquisition/SKILL.md \
  -o ~/.claude/skills/authenticated-session-acquisition/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/authenticated-session-acquisition/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/authenticated-session-acquisition/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\authenticated-session-acquisition\SKILL.md on Windows. See the full install guide for step-by-step instructions.

📱 Install from your phone or desktop Telegram

Open @claudskills_bot on Telegram, tap Open Desktop App, and the desktop app installs this skill for you. Or share the bot link with a colleague — they get the same one-tap install. Learn more →

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

For the full experience including quality scoring and one-click install features for each skill — upgrade to Pro.

See pricing → Download desktop app

Frequently asked questions

How do I install the Authenticated Session Acquisition Claude Code skill?

Install via the ClaudSkills desktop app (one click) or copy SKILL.md from the source repository to ~/.claude/skills/authenticated-session-acquisition/SKILL.md and restart Claude Code. Both flows are detailed at claudskills.com/install/.

What does the Authenticated Session Acquisition skill do?

Is this skill free to install?

Yes. ClaudSkills is an open registry — every skill keeps its source repository's license, and manual install via copy is free. ClaudSkills Pro ($9/mo, $79/yr, or $149 one-time) adds one-click install via the desktop app and a multi-signal Quality Score.

When should I use the Authenticated Session Acquisition skill?

Use Authenticated Session Acquisition when your Claude Code task falls under the Security category — specifically in the web security area. Claude Code auto-discovers installed skills and invokes the right one based on the task description, so you can also ask Claude directly (e.g. "use Authenticated Session Acquisition" or describe the task and let Claude pick). Browse related skills at /category/security/.

What is a Claude Code skill and how does the Authenticated Session Acquisition skill fit in?

A Claude Code skill is a SKILL.md file that lives under ~/.claude/skills/<name>/ and tells the Claude Code CLI agent how to perform a specific task (instructions, prompts, allowed tools). Skills are auto-discovered at session start. Authenticated Session Acquisition is one of 67,000+ skills indexed in the open ClaudSkills catalog, classified under the Security category. Learn more at /learn/what-is-a-claude-skill/.

Attribution & license

Source: https://github.com/transilienceai/communitytools/blob/HEAD/skills/authenticated-session-acquisition/SKILL.md
License: MIT
Author: transilienceai
Website: https://www.transilience.ai/

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA

transilienceai. (2026). Authenticated Session Acquisition [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/authenticated-session-acquisition/

BibTeX

@misc{authenticated-session-acquisition-2026,
  author    = {transilienceai},
  title     = {Authenticated Session Acquisition [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/authenticated-session-acquisition/}
}

Embed this skill

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Badge

[![ClaudSkills](https://claudskills.com/badge/authenticated-session-acquisition.svg)](https://claudskills.com/skills/authenticated-session-acquisition/?utm_source=badge&utm_medium=readme&utm_campaign=skill_badge)

Security scan

Grade A · scanned 2026-08-14 — free static scan against the OWASP Agentic Skills Top 10.

The scan flagged 1 of 10 categories (filesystem), including lower-severity patterns. Patterns shown inside code fences are weighted as examples rather than instructions — read the grading methodology for what this does and does not guarantee.

✓ Prompt injection
✓ Data exfiltration
✓ Supply chain
✓ Reverse shell
✓ Credentials
✓ Execution
⚠ Filesystem
✓ Persistence
✓ Obfuscation
✓ Network

Show this grade on your repo (click to copy):

[![Security: A](https://img.shields.io/badge/Security-A-2e7d32)](https://claudskills.com/skills/authenticated-session-acquisition/#security)

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Browse all Security skills → Top 100 skills

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