auditing-mfa-enrollment-and-reset-abuse

auditing-mfa-enrollment-and-reset-abuse is a skill for Claude Code from UnboundCompute/security-agent-skills. It costs 205 tokens per session (2,383 once invoked), scanned A, original, MIT.

A security audit guide for multi-factor authentication enrollment, reset, recovery, and step-up checks. Multi-factor authentication requires more than one proof of identity, such as a password and an authenticator.

In plain words
What is it for?
It is for reviewing authenticator enrollment, MFA resets, recovery signals, sensitive-action prompts, backup codes, and push approvals.
Why use it?
It finds account-recovery and enrollment paths that let someone with a stolen password add their own factor or bypass the extra check.

Skill for Claude Code

Written for Claude Code: shipped in a Claude Code plugin.

Part of the security-agent-skills plugin — 194 skills shipped together

Good fit It is for reviewing authenticator enrollment, MFA resets, recovery signals, sensitive-action prompts, backup codes, and push approvals.

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Install with agentmods
npx agentmods add skills/unboundcompute/security-agent-skills/auditing-mfa-enrollment-and-reset-abuse
Install

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.

Any agent
npx skills add UnboundCompute/security-agent-skills --skill auditing-mfa-enrollment-and-reset-abuse
Clone the repo
git clone --depth 1 https://github.com/UnboundCompute/security-agent-skills

Made for: Claude Code.

Or install security-agent-skills, the plugin that ships this one along with the rest of its 194 skills.

Wrote this? Show the measurements

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README.md
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Your own site
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Your own site · 80×15
<a href="https://agentmods.dev/skills/unboundcompute/security-agent-skills/auditing-mfa-enrollment-and-reset-abuse"><img src="https://agentmods.dev/badge/skills/unboundcompute/security-agent-skills/auditing-mfa-enrollment-and-reset-abuse.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 205 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,383 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Token cost

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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00205 $0.02383
Opus 5.5 $0.00082 $0.00953
Sonnet 5.5 $0.00041 $0.00477
Haiku 4.5 $0.00020 $0.00238

Measured 1mo ago against content hash 4508478e54c6, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

auditing-mfa-enrollment-and-reset-abuse scanned grade A with 0 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 1mo 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.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

skills/auditing-mfa-enrollment-and-reset-abuse/SKILL.md · 149 lines

How it starts

The opening of the file, as written. The whole thing — 149 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Auditing MFA enrollment and reset abuse: the second factor is only as strong as how you enroll and reset it

Multi-factor authentication assumes the attacker who has the password still cannot pass the second factor, and that assumption lives or dies in three places most audits skip: how a factor is enrolled, how it is reset or recovered, and how a step-up is enforced. If an account with only the first factor satisfied can enroll a new authenticator without re-proving identity, an attacker with a stolen password simply adds their own second factor and now passes MFA legitimately. If the reset or recovery flow is guarded only by a weak signal, an email link to an inbox the attacker controls, a knowledge question, a support request that does not verify hard, then MFA resets back to attacker control and the second factor is decorative. If a step-up prompt on a sensitive action can be skipped, or backup codes are weak, reusable, or handed out without authentication, or a push approval lands on a single tap so fatigue or bombing gets an accidental yes, the factor is bypassed rather than broken. The audit treats enrollment and reset as privileged actions that must re-prove identity, and checks that every step-up is actually enforced. You audit this by holding only the first factor and trying to add, reset, or skip the second.

When to use

  • An authentication system lets users enroll a second factor, reset or recover it, use backup codes, or satisfy a step-up prompt.
  • Enrollment or reset may not re-prove identity, or recovery may be guarded only by a weak signal (email link, knowledge question, support request).
  • Step-up may be skippable, backup codes may be weak or unauthenticated, or push approval may succeed on a single tap (MFA fatigue).

Scope check

Test MFA enrollment and reset only against accounts and systems you own or are authorized to assess, with test accounts. Enrolling, resetting, and bypassing factors changes real authentication state, so use test identities and never add a factor to, reset, or take over an account that is not yours. If you can't name the authorization, stop.

Read the full file on GitHub · 149 lines

Changes

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.

  1. 1mo ago First seen · 149 lines · 205 tokens per session scan A 4508478e54c6

Subscribe to this mod's changes

auditing-mfa-enrollment-and-reset-abuse is a skill published in the GitHub repository UnboundCompute/security-agent-skills (5 stars, last pushed 1mo ago), licensed MIT. It adds 205 tokens to every session and 2,383 once invoked, about $0.0008 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-05.

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