What Genesis Code Doctor fixed
- Only verified changes appear here.
- Each repair can show affected files, routes, checks, or rules.
- Regression checks are recorded separately from the repair itself.
Fail-closed cross-window message admissionREAL PRODUCT
GENESIS PRODUCT VIEWCross-Origin postMessage Origin Guard
10package files
14automated test cases
FREEdirect ZIP
Exact origin and source identity combine with a versioned envelope, action-specific schemas, bounded traversal, and immutable accepted payloads. This is the real published Genesis interface—not a stock image.
FREE SECURITY CODE · VERIFIED
Genesis Code Store · GCD-WEB-045
Cross-Origin postMessage Origin Guard
Accept cross-window messages only when their exact origin, source window, protocol envelope, action, and bounded payload all pass a fail-closed gate.
An original dependency-free JavaScript guard for iframe, popup, widget, and integration receivers. It requires a canonical allowlist, exact source-window identity, versioned channel and action contracts, JSON-only payloads, action-specific validators, hard traversal limits, and detached deeply frozen accepted data.
Simply put:
Accept cross-window messages only when their exact origin, source window, protocol envelope, action, and bounded payload all pass a fail-closed gate.
AVAILABLE NOWFree
Online tool No checkout required
Free Product LicenseSee included license
Free products remain subject to the written license included with the package. Free does not mean public-domain or unrestricted resale. Domain limits count websites, not individual page URLs.
Read license termsWhat it helps you do
- Exact origin and source-window checks
- Bounded JSON-only action payloads
- Detached deeply frozen accepted data
TESTED FREE CODEA deterministic admission gate for postMessage receivers.
What this specific product actually does
Every Genesis listing has its own capabilities, workflow, automation status, limits, and proof standard—without generic promises copied from another product.
CAPABILITIES
Inside Cross-Origin postMessage Origin Guard
- 01Requires an exact canonical HTTPS origin from a bounded allowlist.
- 02Requires the exact expected Window reference before dispatching an action.
- 03Validates channel, protocol version, action name, message ID, and envelope keys.
- 04Applies an action-specific payload validator after structural safety checks.
- 05Rejects cycles, accessors, dangerous keys, class instances, and non-JSON values.
- 06Bounds encoded bytes, depth, total keys, array length, string length, origins, and actions.
TESTED FREE CODE
A deterministic admission gate for postMessage receivers.
The guard decides whether a message is structurally admissible; the host remains responsible for origin selection, sender behavior, authentication, authorization, browser isolation, and downstream effects.
Exact identityBounded payloadFail closed
AUTOMATIC REPAIRNot enabled
This product does not modify a customer website.
PRODUCT FIT
Who this is built for
- 01Iframe and embedded-widget message receivers
- 02Popup, payment, identity, and partner-integration callbacks
- 03Framework-neutral browser applications using window.postMessage
DELIVERY
How you receive it
Listing Code
GCD-WEB-045
Format
Verified ZIP · JavaScript + 14 tests + README + START-HERE + inventory
Compatibility
All Platforms, Floot, WordPress, HTML / CSS, Shopify, Wix, Squarespace, Webflow, React / Next.js
Cost
Free
This listing is a downloadable Genesis code package. The ZIP includes reusable code and START-HERE directions.
HOW TO USE IT
Three steps for this product
- 01
Declare the trust boundary
List only canonical expected origins, capture the exact sender Window, and define one validator for every permitted action.
- 02
Validate before dispatch
Pass each MessageEvent through the guard and ignore every rejected result without echoing private validator details.
- 03
Authorize and test
Perform user and business authorization after validation, send with an exact targetOrigin, and test the real frame or popup lifecycle.
GENESIS CODE DOCTOR™
Before & After Repair Report
Cross-Origin postMessage Origin Guard · GCD-WEB-045
Evidence-backed output
Report format preview. Scores and status values populate only from measurements produced by an actual run. Genesis does not invent improvements.
CategoryBeforeAfterStatus
SecurityMeasured at runVerified after repairAwaiting run
IntegrationsMeasured at runVerified after repairAwaiting run
Application HealthMeasured at runVerified after repairAwaiting run
Still needs attention
- Unresolved, blocked, unavailable, or not-tested items remain visible.
- Evidence links can explain why an item passed, failed, or needs review.
- Follow-up verification can be run after implementation.
Know the fit, evidence, and handoff before a repair is used.
These controls turn a code product into a traceable repair workflow. They do not claim compatibility or success that has not been verified.
Declared support is available
Declared platforms: All Platforms, Floot, WordPress, HTML / CSS, Shopify, Wix, Squarespace, Webflow, React / Next.js
Exact compatibility still depends on the customer's framework version, dependencies, hosting, custom code, and current site state.
Ready for project-specific pre-check
Lifecycle protection is part of the product standard.
- Compatibility is reviewed before release.
- Regression and rollback requirements stay explicit.
- Follow-up verification can be run after implementation.
Genesis keeps the recommendation tied to evidence.
- Confirm the observed problem.
- Check product fit and safety boundary.
- Apply only the authorized repair scope.
- Re-run equivalent checks before calling it fixed.
Generate a clean technical handoff in one click.
The handoff includes product identity, declared compatibility, delivery method, capabilities, safety boundary, and the verification sequence.
IMPORTANT BOUNDARY
What this item does not claim
This package does not authenticate a user, authorize a business action, validate a sender's internal state, make an untrusted iframe safe, choose a correct origin allowlist, protect a sender that uses a wildcard targetOrigin, or replace Content Security Policy and sandbox review. The host must perform authorization after validation.
DOWNLOADABLE CODE POLICY
Simple delivery when verified code is released
Free code uses Free Download. Paid code uses Add to Cart. Every released package includes a verified ZIP, README, license notice, and START-HERE directions.
Copyright © Connect Point ISP LLC. Genesis Code Doctor™. All rights reserved. Purchase or download does not transfer ownership. Except where a product expressly provides a different written license, Genesis packages may not be resold, redistributed, sublicensed, repackaged for sale, or published as a competing download.
Free Product License: See included license. Free products remain subject to the written license included with the package. Free does not mean public-domain or unrestricted resale. A domain means a distinct production website host; pages and routes under the same domain do not consume separate activations. Agency use beyond the included limit requires an expanded agency license.