Improper Authentication Affecting github.com/zitadel/zitadel/internal/api/ui/login package, versions >=2.50.0 <2.71.19>=3.0.0-rc.1 <3.4.4>=4.0.0-rc.1 <4.6.6
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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Start learning- Snyk IDSNYK-GOLANG-GITHUBCOMZITADELZITADELINTERNALAPIUILOGIN-14038271
- published16 Nov 2025
- disclosed14 Nov 2025
- creditJan Kühnlein
Introduced: 14 Nov 2025
NewCVE-2025-64717 (opens in a new tab)How to fix?
Upgrade github.com/zitadel/zitadel/internal/api/ui/login to version 2.71.19, 3.4.4, 4.6.6 or higher.
Overview
Affected versions of this package are vulnerable to Improper Authentication via the checkAutoLinking function, when auto-linking was enabled for an IdP, there was no verification to ensure that linking to the identified user was permitted.. An attacker can gain unauthorized access to an existing user account by initiating a login using an external identity provider that has been deactivated or is not permitted for the organization, leading to the attacker's identity being incorrectly linked to the internal account.
Note: This is only exploitable if the targeted account does not have multi-factor authentication enabled and the identity provider is registered at the instance level.