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CVE-2025-52553

Reported by SPIEGEL-Verlag

Insufficient Session verification for Remote Access Control endpoint access​

Summary​

After authorizing access to a RAC endpoint, authentik creates a token which is used for a single connection and is sent to the client in the URL. This token is intended to only be valid for the session of the user who authorized the connection, however this check is currently missing.

Patches​

authentik 2025.4.3 and 2025.6.3 fix this issue.

Impact​

When for example using RAC during a screenshare, a malicious user could access the same session by copying the URL from the shown browser.

Workarounds​

As a workaround it is recommended to decrease the duration a token is valid for (in the RAC Provider settings, set Connection expiry to minutes=5 for example). We also recommend enabling the option Delete authorization on disconnect.

For more information​

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