Open Redirect Affecting github.com/zitadel/zitadel/internal/api/grpc/server/connect_middleware package, versions >=2.0.0 <2.71.18>=3.0.0-rc.1 <3.4.3>=4.0.0-rc.1 <4.6.0
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-GOLANG-GITHUBCOMZITADELZITADELINTERNALAPIGRPCSERVERCONNECTMIDDLEWARE-13775890
- published30 Oct 2025
- disclosed29 Oct 2025
- creditAmit Laish
Introduced: 29 Oct 2025
NewCVE-2025-64101 Â (opens in a new tab)How to fix?
Upgrade github.com/zitadel/zitadel/internal/api/grpc/server/connect_middleware to version 2.71.18, 3.4.3, 4.6.0 or higher.
Overview
Affected versions of this package are vulnerable to Open Redirect via manipulation of the Forwarded or X-Forwarded-Host headers used to construct password reset confirmation links. An attacker can gain unauthorized access to user accounts by tricking users into clicking a password reset link that sends the secret reset code to a domain controlled by the attacker.
Note: This is only exploitable if Multi-Factor Authentication (MFA) or Passwordless authentication is not enabled for the targeted account.
Workaround
This vulnerability can be mitigated by configuring a fronting proxy to delete all Forwarded and X-Forwarded-Host header values before requests reach the application.