CVE-2025-57821
Basecamp's Google Sign-In adds Google sign-in to Rails applications. Prior to version 1.3.0, it is possible to craft a malformed URL that passes the "same origin" check, resulting in the user being redirected to another origin. Rails applications configured to store the flash information in a session cookie may be vulnerable, if this can be chained with an attack that allows injection of arbitrary data into the session cookie. This issue has been patched in version 1.3.0. If upgrading is not possible at this time, a way to mitigate the chained attack can be done by explicitly setting SameSite=Lax or SameSite=Strict on the application session cookie.
- Affected products
- Google Sign In, Rails
- Fix
- Available
- CVSS 3.1
- 4.2 MEDIUM
- EPSS
- 0.2% (15th percentile)
- Weakness
- CWE-601
- NVD status
- Deferred
- Published
- 2025-08-27
No indexed exploits for CVE-2025-57821 yet
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No exploit for CVE-2025-57821 has been indexed yet. Our index is built from live traffic and upstream syncs, so this page can only say what it knows — not that no exploit exists.