CVE-2019-9837: Openid Connect

Medium severity, CVSS 6.1. EPSS: 1.3% chance of exploitation in the next 30 days.

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.

Affected products

• Openid Openid Connect: from 1.4.0, before 1.5.4 (fixed in 1.5.4)

Published 2019-03-21. Last modified 2026-06-17.