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Advisories

Better Auth 1.5.0-beta.12 before 1.7.7 Authentication Bypass via OAuth Proxy

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Severity
critical
Date
Affecting

  • better-auth >= 1.5.0-beta.12, < 1.7.7

CWE
  • CWE-287 Improper Authentication
CVSS
9.1
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
iabdullah215, martinfrancois
Description
Better Auth from 1.5.0-beta.12 before 1.7.7 contains an authentication bypass vulnerability in the OAuth Proxy plugin that allows unauthenticated attackers to sign in as other users by forging encrypted profiles. When the proxy shares the global secret and cookie-stored state is used, attackers can obtain encrypted state for a fake profile with a victim's verified email to take over the account via implicit linking.

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