Open Redirect Affecting google_sign_in package, versions <1.3.0
Threat Intelligence
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-RUBY-GOOGLESIGNIN-12225346
- published28 Aug 2025
- disclosed27 Aug 2025
- creditParsa Ghorbani
Introduced: 27 Aug 2025
NewCVE-2025-57821 (opens in a new tab)How to fix?
Upgrade google_sign_in to version 1.3.0 or higher.
Overview
google_sign_in is a Sign in (or up) with Google for Rails applications
Affected versions of this package are vulnerable to Open Redirect via the ensure_same_origin function in the redirect_protector.rb file. An attacker can cause users to be redirected to an attacker-controlled origin by injecting a crafted URL, potentially exposing authentication information such as tokens.
Note: This is exploitable if the application is configured to store session information in a session cookie, and the attacker can inject arbitrary data into the session cookie.
Workaround
This vulnerability can be mitigated by explicitly setting SameSite=Lax or SameSite=Strict on the application session cookie.