Open Redirect Affecting @astrojs/internal-helpers package, versions >=0.6.1 <0.7.1
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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Test your applications- Snyk IDSNYK-JS-ASTROJSINTERNALHELPERS-11508621
- published8 Aug 2025
- disclosed7 Aug 2025
- creditM.G.Farisi
Introduced: 7 Aug 2025
NewCVE-2025-54793 (opens in a new tab)How to fix?
Upgrade @astrojs/internal-helpers to version 0.7.1 or higher.
Overview
@astrojs/internal-helpers is an Internal helpers used by core Astro packages.
Affected versions of this package are vulnerable to Open Redirect the trailing slash redirection logic when handling URLs with double slashes in the path. An attacker can redirect users to arbitrary external domains by crafting a specially formed URL such as https://mydomain.com//malicious-site.com/ that triggers a protocol-relative redirect.
Workaround
This can be mitigated by blocking outgoing redirect responses with a Location header value that starts with //.