Origin Validation Error Affecting @parcel/reporter-dev-server package, versions *
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published18 Sept 2025
- disclosed17 Sept 2025
- creditR4356th
Introduced: 17 Sep 2025
NewCVE-2025-56648 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
@parcel/reporter-dev-server is a Blazing fast, zero configuration web application bundler
Affected versions of this package are vulnerable to Origin Validation Error via improper origin validation in the development server. An attacker can access source code by tricking a developer into visiting a malicious website that sends crafted XMLHTTPRequests to the local server.