CVE-2025-46815: ZITADEL Allows IdP Intent Token Reuse
Impact
ZITADEL offers developers the ability to manage user sessions using the Session API. This API enables the use of IdPs for authentication, known as idp intents.
Following a successful idp intent, the client receives an id and token on a predefined URI. These id and token can then be used to authenticate the user or their session.
However, it was possible to exploit this feature by repeatedly using intents. This allowed an attacker with access to the application’s URI to retrieve the id and token, enabling them to authenticate on behalf of the user.
It’s important to note that the use of additional factors (MFA) prevents a complete authentication process and, consequently, access to the ZITADEL API.
Patches
3.x versions are fixed on >=3.0.0 2.71.x versions are fixed on >=2.71.9 2.x versions are fixed on >=2.70.10
Workarounds
The recommended solution is to update ZITADEL to a patched version.
Questions
If you have any questions or comments about this advisory, please email us at security@zitadel.com
Credits
Thanks to Józef Chraplewski from Nedap for reporting this vulnerability.
Other sources
The identity infrastructure software ZITADEL offers developers the ability to manage user sessions using the Session API. This API enables the use of IdPs for authentication, known as idp intents. Following a successful idp intent, the client receives an id and token on a predefined URI. These id and token can then be used to authenticate the user or their session. However, prior to versions 3.0.0, 2.71.9, and 2.70.10, it was possible to exploit this feature by repeatedly using intents. This allowed an attacker with access to the application’s URI to retrieve the id and token, enabling them to authenticate on behalf of the user. It's important to note that the use of additional factors (MFA) prevents a complete authentication process and, consequently, access to the ZITADEL API. Versions 3.0.0, 2.71.9, and 2.70.10 contain a fix for the issue. No known workarounds other than upgrading are available.
— MITRE
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2025-46815?
CVE-2025-46815 is classified as a medium severity vulnerability impacting user session management.
How do I fix CVE-2025-46815?
To mitigate CVE-2025-46815, upgrade ZITADEL to version 2.71.9, 2.70.10, or 3.0.0.
Which versions of ZITADEL are affected by CVE-2025-46815?
CVE-2025-46815 affects ZITADEL versions from 2.71.0 to 2.71.8 and below 2.70.10, as well as pre-release versions of 3.0.0.
What does CVE-2025-46815 affect?
CVE-2025-46815 affects the ZITADEL Session API, specifically the management of user sessions using IdPs.
Are there any public references for CVE-2025-46815?
Yes, CVE-2025-46815 is documented in GitHub advisories and includes specific remediation instructions.