ADVISORIES

• CVE-2019-9837 (NVD)
• GHSA-vv4c-g6q7-p3q7
• Vendor Advisory

GEM

doorkeeper-openid_connect

SEVERITY

CVSS v3.x: 6.1 (Medium)

UNAFFECTED VERSIONS

• < 1.4.0

PATCHED VERSIONS

• >= 1.5.4

DESCRIPTION

Doorkeeper::OpenidConnect (aka the OpenID Connect extension for Doorkeeper) 1.4.x and 1.5.x before 1.5.4 has an open redirect via the redirect_uri field in an OAuth authorization request (that results in an error response) with the 'openid' scope and a prompt=none value. This allows phishing attacks against the authorization flow.