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Advisories

Grav Login OAuth Plugin before 1.4.3 Predictable Local Credentials Authentication Bypass

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severity
critical
date
Affecting

  • grav-plugin-login-oauth >= 1.0.0-beta.1, < 1.4.3

CWE
  • CWE-1391 Use of Weak Credentials
CVSS
9.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
AlpetGexha
Description
Grav Login OAuth plugin (grav-plugin-login-oauth) before 1.4.3 provisions OAuth accounts as ordinary Grav users with a deterministic <provider>.<id> username and an unsalted MD5 hash of the provider identifier as the password, without disabling password login. Unauthenticated remote attackers who learn or guess a provider identifier can reproduce these credentials and log in, gaining administrative control of privileged accounts.

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