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Advisories

@better-auth/oauth-provider before 1.7.0-beta.4 Authorization Bypass

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severity
medium
date
Affecting

  • oauth-provider >= 1.4.8, < 1.7.0-beta.4

CWE
  • CWE-285 Improper Authorization
CVSS
5.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Credit
dvanmali
Description
@better-auth/oauth-provider before 1.7.0-beta.4 fails to bind access-token audience to the authorization grant, allowing clients to request tokens for unrelated resources. Attackers can complete an OAuth flow and obtain access tokens whose audience targets resource servers the authorization never covered, bypassing intended authorization boundaries.

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