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web-app-penetration-testing

Pentest a web app or website end to end — black-box testing of a live URL, staging environment, or local dev server that finds and exploits real vulnerabilities (auth bypass, broken access control, IDOR, injection, XSS, SSRF, business logic) and proves each one with a working proof-of-concept instead of a signature match. Runs with Strix, either the self-hosted open-source CLI or the managed app.strix.ai cloud. Use when the user asks to pentest, hack, security-test, or audit their web app, website, web application, or staging site.

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Pentest a web application

Black-box (and optionally source-assisted) penetration testing of a running web app with Strix's autonomous agents. Every reported finding is validated with a working exploit, so there are no signature-based false positives to triage.

Install, LLM setup, all CLI flags, and the managed-cloud alternative are covered in the penetration-testing-with-strix skill — read it if the target is not a running web app, or if strix --version fails. For a run with no Docker and no LLM key, the same binary drives the managed platform: strix cloud login, then strix cloud scans start ... (details in managed-pentesting-with-strix). This skill is the web-app-specific workflow.

1. Confirm authorization and scope

Before running anything, establish:

  • The target is the user's (or they are explicitly authorized to test it). Never pentest a third-party site on a hunch.
  • Which environment. Prefer staging over production; agents send real exploit payloads and will create/modify data.
  • Out-of-scope paths — payment flows, mass-email endpoints, admin destructive actions, third-party SSO providers.
  • Credentials. Most real vulnerabilities live behind login. Without a test account, the agents only ever see the marketing surface.

Ask for anything missing rather than guessing.

2. Run the scan

strix -n -t https://staging.example.com --max-budget 20 \
  --instruction "Test account: qa@example.com / <password>. In scope: /app/*, /api/*. Do not touch /billing or send email. Focus on access control between the two seeded orgs."

Notes that matter for web apps specifically:

  • Give it credentials via --instruction (or --instruction-file for anything long), including how to log in if the flow is unusual (magic link, SSO, MFA-exempt test user).
  • Two accounts beat one. Multi-tenant IDOR and broken-access-control bugs — consistently the highest-impact class in web apps — can only be proven when the agent can attempt cross-account access.
  • Add the repo for white-box depth when you have the source: -t https://github.com/org/app -t https://staging.example.com (or a local path). Source access materially improves coverage of business-logic and authorization flaws.
  • Localhost works. Point at http://host.docker.internal:3000 (Docker Desktop) so the sandbox can reach a dev server on the host.
  • --scan-mode quick for a fast dev-loop pass, standard (~30 min) for a normal review, deep for pre-release assurance. Always set --max-budget.

For a hosted run with no Docker/LLM key, or when the user wants a shareable dashboard and an auditor-ready PDF, use the cloud path in managed-pentesting-with-strix instead — same engine, same findings.

3. Review results

Read strix_runs/<run>/penetration_test_report.md first, then per-finding files in vulnerabilities/. Each contains the PoC — re-run it yourself to confirm before reporting to the user.

Exit codes: 0 no validated vulns in what was analyzed, 2 vulnerabilities found, 1 fatal error. A 0 is not proof of full coverage — if the budget or turn cap was hit the scan wraps up early, so check run.json status and cost against --max-budget before calling the app clean.

4. Fix and verify

Hand findings to the fix-security-vulnerabilities-with-strix skill: patch the root cause, then re-run Strix against the same target to prove the exploit no longer works. Re-testing is the only reliable confirmation a fix landed.

To keep the app tested on every change rather than once, wire Strix into CI with ci-security-scanning-with-strix.

レビュー

まだレビューはありません。使ってみた感想をお寄せください。

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概要と使いどころ

Security-test a REST, GraphQL, or gRPC API with Strix — autonomous agents that enumerate endpoints from an OpenAPI/GraphQL schema (or by crawling), then actually exploit the API-specific vulnerability classes in the OWASP API Security Top 10 (2023) — broken object-level authorization (BOLA/IDOR), broken object property level authorization (excessive data exposure and mass assignment), broken function-level authorization, unrestricted resource consumption, SSRF, injection, and auth/token flaws. Every finding comes with a working proof-of-concept request. Use when the user asks to pentest, security-test, audit, or find vulnerabilities in an API, endpoint, or backend service.

日本語の概要は準備中です。原文の説明を表示しています。

usestrix/strix6.8万2026年10月11日 更新

Application security testing (AppSec) across a whole product with Strix — decide which asset needs which test (source code, running web app, API, CI pipeline), run it, and turn the results into a ranked remediation plan. Autonomous agents exploit and prove each issue instead of emitting static-analysis alerts, so the plan is ordered by what is actually reachable. Use when the user asks for an application security review or audit, an appsec assessment, vulnerability scanning across their stack, a security review before a launch or a customer security questionnaire, or does not yet know which kind of security test they need.

日本語の概要は準備中です。原文の説明を表示しています。

usestrix/strix6.8万2026年10月11日 更新

Add security scanning to CI/CD with Strix — GitHub Actions, GitLab CI, or any pipeline — so every pull request gets a diff-scoped AI pentest that blocks vulnerable code before it merges, with results as PR comments and SARIF uploaded to code scanning. Covers both the self-hosted open-source CLI (runs in your runner) and the managed app.strix.ai platform (GitHub/GitLab app or API, no runner infra). Use when the user asks to add security scanning, SAST/DAST, pentesting, vulnerability checks, or automated security review to their CI pipeline, pre-merge gate, or PR workflow.

日本語の概要は準備中です。原文の説明を表示しています。

usestrix/strix6.8万2026年10月11日 更新

Find security vulnerabilities in a codebase or repository with Strix — a white-box AI security review that reads your source, reasons about the actual data flow and authorization model, then exploits what it finds in a live sandbox so every reported issue has a working proof-of-concept instead of a noisy static-analysis alert. Covers injection, XSS, SSRF, broken access control and IDOR, insecure deserialization, secrets in code, unsafe dependencies, and business-logic flaws. Use when the user asks to security-scan, security-review, or audit their code, repo, or pull request for vulnerabilities.

日本語の概要は準備中です。原文の説明を表示しています。

usestrix/strix6.8万2026年10月11日 更新

Fix security vulnerabilities found by a Strix pentest (open-source CLI or app.strix.ai cloud) — triage by severity, patch the root cause rather than the symptom, and re-run Strix to prove each fix actually closes the exploit. Handles injection, XSS, SSRF, broken access control, IDOR, and other validated findings. Use after a Strix scan reports findings, or when the user asks to remediate, patch, or fix security issues from a strix_runs report, vulnerabilities.json, findings.sarif, or a cloud scan.

日本語の概要は準備中です。原文の説明を表示しています。

usestrix/strix6.8万2026年10月11日 更新

Run a managed pentest of a web app, API, repository, or local workspace on the app.strix.ai platform with the `strix cloud` CLI or REST API — no local Docker or LLM key needed. Safely review and upload local source, register assets, launch and poll scans, triage vulnerabilities, export SARIF, download compliance reports, start PR reviews, buy credits, and set up schedules or webhooks. Use for managed, continuous, scheduled, team-tracked, or sandboxed-agent security testing.

日本語の概要は準備中です。原文の説明を表示しています。

usestrix/strix6.8万2026年10月11日 更新

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