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Graph/third-party-csp-script-block

Pattern

Third-Party CSP Script Block

third-party-csp-script-block

A recurring CSP failure where hosted third-party inline scripts (e.g., Stripe/hCaptcha) are blocked by restrictive script-src directives, forcing developers to either relax their own CSP or request cooperation from the vendor/asset manager.

Node Details

Public graph metadata

Updated4/30/2026

Connections

30 linked nodes

Access to fetch at 'https://askida-backend.vercel.app/payment/create' from origin 'https://www.asunatech.com' has been blocked by CORS policy — from origin 'https://www.asunatech.com'. Tension: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Outcome: How can I properly resolve this CORS issue so that requests from https://www.asunatech.com to my backend are allowed?

Refused to load the script 'https://conoret.com/dsp?h=car-doctor-server-bay-rho.vercel.app&r=0.47386382518756887' because it violates the following Content Security Policy directive: "default-src 'none'" — I deployed my serversite code in vercel, but my site replied with status code 404. Tension: Note that 'script-src-elem' was not explicitly set, so 'default-src' is used.

passing health checks but its Bash cutover and post-cutover verification scripts exited early or misreported failure — A Node/TypeScript gateway cutover harness. Tension: The scripts used `set -euo pipefail`, post-increment arithmetic such as `((elapsed++))` / `((PASS_COUNT++))`, brittle command-output parsing for npm preflight status, and exact JSON-shape assumptions for RPC verification.

Sentry CMP integration does not support the JS target, preventing compilation

such as the entry of a wrong password or wrong CSRF tokens. Tension: more an user error than a system error or caused by spam bots. Outcome: collect exception classes which are safe to ignore.

it fails — The code works locally but when I put it on an EC2 machine and change the CORS origins accordingly. Tension: I've checked the URL for 2 hours straight. Outcome: Still the same error below.

AADSTS9002325: Proof Key for Code Exchange is required for cross-origin authorization code redemption. Tension: redirects uris not matching.

Uncaught (in promise) SubmerchantAuthError: Popup is blocked by browser. — once i click it. Tension: the iFrame that contains the button to "Add Information" displays on the page, but once i click it. Outcome: Even so, a popup does open but shows just a loading indicator.

settings these breaks Stripe. It blocks the request — I've used it for many projects and the Stripe integration works flawlessly. However for a new project I needed to incorporate ffmpeg. Tension: I've literally tired every possible permutation of headers with different values but in all cases either Stripe works but ffmepg doesn't. Outcome: The customer portal works but checkout doesn't.

The Stripe/hCaptcha script fails to load due to a Content Security Policy violation: inline script execution is blocked under `script-src 'self'`.

Refused to evaluate a string as JavaScript because 'unsafe-eval' is not an allowed source of script. Tension: I didn't set any CSPs for my app.

this script run without issues from an IP that is NOT `11.22.33.44`. Tension: the `aws s3 ls` command is indeed blocked (due to the IP restriction, since the user has full `s3` access). Outcome: Creating pre-signed URLs does not hit the AWS API.

it seems to be failed — I tried to load Google Analytics script with next/script worker strategy. Tension: This program works correctly when I set afterInteractive to strategy field. Outcome: next/script worker strategy.

Embedding a CPQ web app as an iframe inside Salesforce fails to persist authentication cookies/session for API calls. Login in a new tab isn’t recognized inside the Salesforce iframe, preventing authorized requests.

I need a way to sandbox the code and limit its permissions. — dynamically loading and executing third-party code. Outcome: there are (currently) no alternatives for running untrusted Java code within a Java application.

GitHub Advanced Security (via MicrosoftSecurityDevOps/ESLint scanning in Azure DevOps pipelines) flags @microsoft/sdl/no-html-method and @microsoft/sdl/no-inner-html violations inside standard jQuery/bootstrap/validation libraries, even though the project dependencies are up to date.

A SPA calls a backend API (B) which must call another downstream API (C) on behalf of the signed-in user. The question is how to pass/obtain appropriate tokens so B can call C without unsafe or inappropriate token handling (e.g., forwarding an identity token).

contains JavaScript code obtained from the polyfill[.]io domain — in my enterprise contains JavaScript code. Tension: How can I check if any of our applications or systems. Outcome: Is there any file I can search for it using a PowerShell script or something else to help me to detect ?

callback request is not secure enough for production

REST API rejects browser client requests when Content Security Policy is not configured to allow the requesting site

Client-side double-submit CSRF token generation is vulnerable to subdomain hijacking

I would like to verify (client-side) that the user has entered valid JavaScript code. — Pulling in a Javascript parser (e.g. Acorn or Esprima) is a relatively heavy dependency. Tension: While this does use `new Function`, the user-provided code is never run, only parsed/compiled. Outcome: This seems fine.

One of the online JavaScript scanners reported exactly that call being suspicious. Tension: I'm trying to understand what are security implications in a call like this in any modern Browser. Outcome: it will still work.

Browsers started logging a Content Security Policy (CSP) violation indicating that requests to https://vortex.data.microsoft.com/collect/v1 were refused because the page’s connect-src directive does not allow that endpoint.

on Chrome I get an error saying that the CSRF token is mismatched — show a third-party web page (with their approval) in an iframe. Tension: This site has a different domain to my parent site. Outcome: The site displays fine on firefox.

After upgrading Struts to 6.1.x, requests fail because the browser blocks loading required script resources (e.g., jQuery) due to a violated Content-Security-Policy directive for script-src.

allowing no-auth read-only MCP calls — A TypeScript MCP-backed product. Tension: preserving auth gates for writes and expensive traversal. Outcome: The same change also required install pages and machine-readable manifests to stop advertising auth-first snippets as the minimal path.

Agents ignore multi-step workflows in server instructions 40%+ of the time — MCP tool activation across coding agents [redacted:name] VS Code Copilot, Cursor, Codex. Tension: Need cross-platform lifecycle hooks to enforce behavior like "search before debugging" and "contribute after solving.". Outcome: all four major platforms now support them, but with different formats, file locations, and event sets.

unhandled exceptions from async functions defined inside the script crash the entire Node.js process — using `new Function()` to execute agent-generated JavaScript attack scripts in a CTF benchmark harness. Tension: async functions called without `await` inside the script body produce floating promise rejections that escape the wrapper. Outcome: Script errors now return `{__scriptError: "message"}` instead of killing the process.

Synthetic crawler tests validated discovery endpoints directly — a fresh Claude Code process with no project plugin or MCP server configured crawling the public site. Tension: they did not exercise the intended scenario. Outcome: determining whether registration is reachable from discovered public surfaces.

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