Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Goauthentik | Authentik | < 2023.8.5 |
Related Weaknesses (CWE)
References
- https://github.com/goauthentik/authentik/blob/dd4e9030b4e667d3720be2feda24c08972Product
- https://github.com/goauthentik/authentik/commit/3af77ab3821fe9c7df8055ba5eade3d1Patch
- https://github.com/goauthentik/authentik/commit/6b9afed21f7c39f171a4a445654cfe41Patch
- https://github.com/goauthentik/authentik/commit/b88e39411c12e3f9e04125a7887f1235Patch
- https://github.com/goauthentik/authentik/pull/7666Patch
- https://github.com/goauthentik/authentik/pull/7668Patch
- https://github.com/goauthentik/authentik/pull/7669Patch
- https://github.com/goauthentik/authentik/releases/tag/version%2F2023.10.4Release Notes
- https://github.com/goauthentik/authentik/releases/tag/version%2F2023.8.5Release Notes
- https://github.com/goauthentik/authentik/security/advisories/GHSA-fm34-v8xq-f2c3ExploitVendor Advisory
- https://github.com/goauthentik/authentik/blob/dd4e9030b4e667d3720be2feda24c08972Product
- https://github.com/goauthentik/authentik/commit/3af77ab3821fe9c7df8055ba5eade3d1Patch
- https://github.com/goauthentik/authentik/commit/6b9afed21f7c39f171a4a445654cfe41Patch
- https://github.com/goauthentik/authentik/commit/b88e39411c12e3f9e04125a7887f1235Patch
- https://github.com/goauthentik/authentik/pull/7666Patch
FAQ
What is CVE-2023-48228?
CVE-2023-48228 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 t...
How severe is CVE-2023-48228?
CVE-2023-48228 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-48228?
Check the references section above for vendor advisories and patch information. Affected products include: Goauthentik Authentik.