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CVE-2023-48228

7.5 · HIGH

authentik is an open-source identity provider.

Published Nov 21, 2023CWE-287EPSS 1.24%

Overview

CVE-2023-48228 is a high-severity vulnerability. It was published on November 21, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

authentik is an open-source identity provider. When initialising a oauth2 flow with a `code_challenge` and `code_method` (thus requesting PKCE), the single sign-on provider (authentik) must check if there is a matching and existing `code_verifier` during the token step. Prior to versions 2023.10.4 and 2023.8.5, authentik checks if the contents of `code_verifier` is matching only when it is provided. When it is left out completely, authentik simply accepts the token request with out it; even when the flow was started with a `code_challenge`. authentik 2023.8.5 and 2023.10.4 fix this issue.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/goauthentik/authentik/blob/dd4e9030b4e667d3720be2feda24c08972602274/authentik/providers/oauth2/views/token.py#L225GitHubgithub.com/goauthentik/authentik/commit/3af77ab3821fe9c7df8055ba5eade3d1ecea03a6GitHubgithub.com/goauthentik/authentik/commit/6b9afed21f7c39f171a4a445654cfe415bba37d5GitHubgithub.com/goauthentik/authentik/commit/b88e39411c12e3f9e04125a7887f12354f760a14GitHubgithub.com/goauthentik/authentik/pull/7666GitHubgithub.com/goauthentik/authentik/pull/7668GitHubgithub.com/goauthentik/authentik/pull/7669GitHubgithub.com/goauthentik/authentik/releases/tag/version%2F2023.10.4GitHubgithub.com/goauthentik/authentik/releases/tag/version%2F2023.8.5GitHubgithub.com/goauthentik/authentik/security/advisories/GHSA-fm34-v8xq-f2c3

How CyberStrike helps

Frequently asked questions

What is CVE-2023-48228?

CVE-2023-48228 is a high-severity vulnerability. It was published on November 21, 2023 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2023-48228?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-48228?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-48228?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-48228 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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