~ / search / GHSA-fm8c-6m29-rp6j

GHSA-fm8c-6m29-rp6j

repostat: Reflected Cross-Site Scripting (XSS) via repo prop in RepoCard

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-27612

Packages

EcosystemPackageAffectedFixed in
npm repostat < 1.0.1 1.0.1

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact The `RepoCard` component is vulnerable to Reflected Cross-Site Scripting (XSS). The vulnerability occurs because the component uses React's `dangerouslySetInnerHTML` to render the repository name (`repo` prop) during the loading state without any sanitization. If a developer using this package passes unvalidated user input directly into the `repo` prop (for example, reading it from a URL query parameter), an attacker can execute arbitrary JavaScript in the context of the user's browser. ### Proof of Concept ```jsx import { RepoCard } from 'repostat'; function App() { const params = new URLSearchParams(window.location.search); const maliciousRepo = params.get('repo') || 'facebook/react'; return <RepoCard repo={maliciousRepo} token="YOUR_TOKEN" />; } ``` ### Remediation Update to version 1.0.1. The use of dangerouslySetInnerHTML has been removed, and the repo prop is now safely rendered using standard React JSX data binding, which automatically escapes HTML entities.

References

External links from the advisory. They lead to third-party sites.