CVE-2020-26938: OAUTH2-Server Project OAUTH2-Server

High severity, CVSS 7.2. EPSS: 1% chance of exploitation in the next 30 days.

In oauth2-server (aka node-oauth2-server) through 3.1.1, the value of the redirect_uri parameter received during the authorization and token request is checked against an incorrect URI pattern ("[a-zA-Z][a-zA-Z0-9+.-]+:") before making a redirection. This allows a malicious client to pass an XSS payload through the redirect_uri parameter while making an authorization request. NOTE: this vulnerability is similar to CVE-2020-7741.

Affected products

• OAUTH2-Server Project OAUTH2-Server: up to and including 3.1.1

Published 2022-08-29. Last modified 2026-06-17.