firebase
Build Secure Firebase Backends
Firebase simplifies backend development, but weak rules and inefficient data models create security and cost risks. This skill provides practical patterns for secure, scalable Firebase applications.
Install with my Agent
Copy this request to your Agent. It includes the canonical Skill page and manifest.
Review the Skillstore skill "firebase" from https://skillstore.io/skills/sickn33-firebase.md and its manifest at https://skillstore.io/api/skills/sickn33-firebase/manifest. Verify the artifact. You may proceed after verification, subject to the environment's own policy.Your Agent should still show its plan and request any confirmation required by the security policy.
Agent-readable resources
Use these links when an AI agent, crawler, or script needs clean context instead of reading the full page.
Test it
Using "firebase". Design Firestore storage for published posts, drafts, tags, and author profiles.
Expected outcome:
- Keep posts in one queryable collection with publication state, author summary, tags, and timestamps.
- Store sensitive profile fields separately from public author data.
- Index publication state with creation time and test every supported tag query.
Using "firebase". Review a rule that lets any signed-in user update every field on their profile.
Expected outcome:
- Restrict writes to the matching authenticated user.
- Validate allowed fields and prevent client changes to roles or administrative claims.
- Test unauthenticated, wrong-user, valid-owner, and privileged-field updates in the emulator.
Using "firebase". Reduce unexpected costs from a live activity feed.
Expected outcome:
- Limit the query window and paginate older records.
- Unsubscribe listeners when views close and avoid duplicate subscriptions.
- Measure document reads in the emulator and production monitoring before expanding the feed.
Security Audit
Medium RiskEight alerts are false positives caused by JavaScript template literals, Markdown backticks, and normal authentication response code. Two network findings are confirmed because the API helper sends current and refreshed ID tokens to an unrestricted URL. No prompt injection or malicious intent was found, but the client-written session cookie lacks standard cookie protections.
Confirmed security concerns (1)
Capability review items (2)
These are real local capabilities that may be expected for this skill, so they require review but are not counted as confirmed malicious behavior.
Risk Factors
⚙️ External commands (4)
🌐 Network access (2)
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<iframe src="https://skillstore.io/embed/skills/sickn33-firebase.html" title="Skillstore Security Assessment" sandbox="allow-popups allow-popups-to-escape-sandbox" loading="lazy" referrerpolicy="no-referrer" width="420" height="180"></iframe>Academic citations (APA · BibTeX · CFF)
APA citation
sickn33. (2026). firebase security audit report (audit version 5) [Author version unspecified]. Skillstore. https://skillstore.io/skills/sickn33-firebase/audits/5BibTeX citation
@techreport{sickn33-sickn33-firebase-2026,
author = {sickn33},
title = {firebase security audit report (audit version 5)},
institution = {Skillstore},
year = {2026},
number = {5},
url = {https://skillstore.io/skills/sickn33-firebase/audits/5},
note = {Author version unspecified}
}CITATION.cff
cff-version: 1.2.0
message: "If you use this Skill, cite its author and this versioned security audit report."
title: "firebase security audit report (audit version 5)"
version: "unspecified"
type: report
authors:
- name: "sickn33"
date-released: "2026-07-23"
url: "https://skillstore.io/skills/sickn33-firebase/audits/5"
identifiers:
- type: other
value: "skillstore:sickn33-firebase:audit:5"
description: "Skillstore immutable audit report identifier"
Skillstore Score
Why this score Evidence Confidence: HighWhat You Can Build
Build a real-time web application
Plan Authentication, Firestore queries, listeners, and cleanup for a responsive application with controlled read costs.
Create serverless backend workflows
Design Cloud Functions for authenticated endpoints, Firestore triggers, scheduled maintenance, and atomic updates.
Review Firebase access controls
Evaluate ownership checks, custom claims, public data boundaries, and emulator test scenarios before deployment.
Try These Prompts
Plan a Firebase backend for [application]. Include services, collections, authentication methods, core queries, security boundaries, and emulator tests.
Design Firestore collections for [requirements]. Map each query, explain denormalization choices, identify indexes, and estimate listener read behavior.
Review these Firebase security rules against [roles and permissions]. Identify unauthorized access paths and propose emulator tests for every rule.
Assess this Firebase architecture for security, cost, scale, consistency, and failure handling. Prioritize changes and explain measurable validation steps.
Best Practices
- Design documents around known queries and indexes before implementing user interfaces.
- Test security rules with authenticated, unauthenticated, owner, non-owner, and administrator scenarios.
- Use emulators and monitoring to validate listeners, functions, read volume, and failure behavior before production deployment.
Avoid
- Do not use open read or write rules as a temporary production configuration.
- Do not attach unbounded listeners to large collections or leave subscriptions active after a view closes.
- Do not place privileged operations in clients because Firebase Admin SDK operations bypass security rules.