vuln-report-writing

vuln-report-writing is a skill for Claude Code, Codex from HermeticOrmus/LibreSecOps-Claude-Code. It costs 0 tokens per session (2,095 once invoked), scanned C, original, MIT.

A guide to writing security vulnerability reports for bug bounty programs, where researchers report flaws in exchange for recognition or payment. It covers report structure, severity scoring, and common mistakes.

In plain words
What is it for?
Use it to write titles, summaries, reproduction steps, impact descriptions, CVSS scores, and remediation advice.
Why use it?
It helps reviewers quickly understand, reproduce, and assess a finding instead of sending questions back or closing an unclear report.

Skill for Claude CodeCodex

Written for no agent in particular: nothing here depends on one.

Good fit Use it to write titles, summaries, reproduction steps, impact descriptions, CVSS scores, and remediation advice.

Compare 6 skills from other repositories ↓
Install with agentmods
npx agentmods add skills/hermeticormus/libresecops-claude-code/vuln-report-writing
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 HermeticOrmus/LibreSecOps-Claude-Code --skill vuln-report-writing
Clone the repo
git clone --depth 1 https://github.com/HermeticOrmus/LibreSecOps-Claude-Code

Made for: Claude Code, Codex.

Wrote 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.

agentmods badge for vuln-report-writing

README.md
[![agentmods](https://agentmods.dev/badge/skills/hermeticormus/libresecops-claude-code/vuln-report-writing/github.svg)](https://agentmods.dev/skills/hermeticormus/libresecops-claude-code/vuln-report-writing)
Your own site
<a href="https://agentmods.dev/skills/hermeticormus/libresecops-claude-code/vuln-report-writing"><img src="https://agentmods.dev/badge/skills/hermeticormus/libresecops-claude-code/vuln-report-writing/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.

agentmods 80×15 button for vuln-report-writing

Your own site · 80×15
<a href="https://agentmods.dev/skills/hermeticormus/libresecops-claude-code/vuln-report-writing"><img src="https://agentmods.dev/badge/skills/hermeticormus/libresecops-claude-code/vuln-report-writing.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 2,095 The whole file, excluding the scripts and references it only reads on demand.
Security scan C 2 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 $0.00000 $0.02095
Opus 5 $0.00000 $0.01047
Sonnet 5 $0.00000 $0.00419
Haiku 4.5 $0.00000 $0.00210

Measured 9d ago against content hash 8f2ca74eacbd, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-09, from the pricing page.

Security

Grade C, and why

vuln-report-writing scanned grade C with 2 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 9d 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.

Cloud metadata endpointhighServer-side request forgery

One request to 169.254.169.254 can return temporary IAM credentials.

- "SSRF via PDF export feature allows access to internal AWS metadata (169.254.169.254) from pdf.example.com"

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

For findings that require specific timing or automation, provide a minimal proof-of-concept script. Include comments explaining each step. Use common languages (Python, curl, JavaScript).
plugins/bug-bounty-methodology/skills/vuln-report-writing/SKILL.md · 164 lines

How it starts

The opening of the file, as written. The whole thing — 164 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Vuln Report Writing

Guide to writing vulnerability reports that get accepted, triaged quickly, and rewarded fairly, with templates, CVSS guidance, and common pitfalls.

Knowledge Base

Why Report Quality Matters

A triage analyst typically handles 50-100+ reports per day. They spend approximately 5 minutes on initial assessment. Your report must communicate the vulnerability's existence, impact, and reproduction method in that time. Reports that require back-and-forth clarification take weeks to resolve instead of days.

Report quality directly affects:

  • Acceptance rate: Clear reports with reproduction steps get accepted. Vague reports get closed as "informative"
  • Triage speed: Well-structured reports are triaged in days. Poor reports sit in queues for weeks
  • Bounty amount: Impact clarity and severity accuracy influence reward decisions
  • Reputation: Consistent quality builds reputation, leading to private program invitations

Title Writing

The title is the single most important line. It appears in triage queues, dashboards, and email notifications.

Formula: [Vulnerability Type] in [Location/Feature] allows [Impact] on [Asset]

Good titles:

  • "Stored XSS via Markdown rendering in comment system allows session cookie theft on app.example.com"
  • "IDOR in /api/v2/orders/{id} allows any authenticated user to view other users' order details including payment information"
  • "SSRF via PDF export feature allows access to internal AWS metadata (169.254.169.254) from pdf.example.com"
  • "Race condition in coupon redemption allows unlimited use of single-use promotional codes"

Bad titles:

  • "XSS" (no location, no impact)
  • "Security issue found" (meaningless)
  • "Critical vulnerability" (no information)
  • "Multiple issues in example.com" (split into separate reports)

CVSS v3.1 Scoring Guide

Common web vulnerability scores:

Vulnerability Typical CVSS Vector Notes
Unauthenticated RCE 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Network, no auth, no interaction
Unauthenticated SQLi (data access) 9.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N Read + write database
Stored XSS (admin context) 8.4 AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N Scope changed, user interaction
SSRF to internal services 7.5-9.1 Varies Depends on what is accessible
IDOR (read sensitive data) 6.5 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Auth required, high confidentiality
Reflected XSS 6.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Scope changed, user interaction
Open redirect 4.7 AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:L/A:N Low impact alone, chains well
Information disclosure (minor) 4.3 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N Low confidentiality impact
Missing security header 0-4.0 Varies Usually informational

Read the full file on GitHub · 164 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. 9d ago First seen · 164 lines · 0 tokens per session scan C 8f2ca74eacbd

Subscribe to this mod's changes

vuln-report-writing is a skill published in the GitHub repository HermeticOrmus/LibreSecOps-Claude-Code (4 stars, last pushed 3mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 2,095 tokens. A static security scan graded it C with 2 findings (cloud metadata endpoint, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

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