authentik cross-provider token validation problems
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 0.4%
exploitation probability
0.4%top 66% of all CVEs
observed exploitation
nono source reports it
authentik is an open-source identity provider. Prior to versions 2024.8.3 and 2024.6.5, access tokens issued to one application can be stolen by that application and used to impersonate the user against any other proxy provider. Also, a user can steal an access token they were legitimately issued for one application and use it to access another application that they aren't allowed to access. Anyone who has more than one proxy provider application with different trust domains or different access control is affected. Versions 2024.8.3 and 2024.6.5 fix the issue.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Affected products
goauthentik · authentikReferences
https://github.com/goauthentik/authentik/blob/70b5a214f2e7205572f914aaf68682501b9f5945/authentik/providers/oauth2/views/introspection.py#L42-L51https://github.com/goauthentik/authentik/blob/70b5a214f2e7205572f914aaf68682501b9f5945/internal/outpost/proxyv2/application/auth_bearer.go#L30-L36https://github.com/goauthentik/authentik/commit/22e586bd8cdc3d1db8a0f18314d76f82371129b2https://github.com/goauthentik/authentik/commit/57a31b5dd16d4adce716b9878455c0d6f58155fehttps://github.com/goauthentik/authentik/security/advisories/GHSA-8gfm-pr6x-pfh9