Ecosyste.ms: Advisories

Security Advisories: GSA_kwCzR0hTQS00cmc2LWZtMjUtZ2MzNM4AAuiV

oauth2-server through 3.1.1 vulnerable to Open Redirect

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.

Permalink: https://github.com/advisories/GHSA-4rg6-fm25-gc34
JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS00cmc2LWZtMjUtZ2MzNM4AAuiV
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: over 1 year ago
Updated: over 1 year ago

CVSS Score: 7.2
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N

Identifiers: GHSA-4rg6-fm25-gc34, CVE-2020-26938
References:

• https://nvd.nist.gov/vuln/detail/CVE-2020-26938
• https://github.com/oauthjs/node-oauth2-server/issues/637
• https://github.com/oauthjs/node-oauth2-server/blob/91d2cbe70a0eddc53d72def96864e2de0fd41703/lib/grant-types/authorization-code-grant-type.js#L143
• https://github.com/oauthjs/node-oauth2-server/blob/91d2cbe70a0eddc53d72def96864e2de0fd41703/lib/validator/is.js#L12
• https://tools.ietf.org/html/rfc3986#section-3
• https://tools.ietf.org/html/rfc6749#section-3.1.2
• https://github.com/advisories/GHSA-4rg6-fm25-gc34

Repository: https://github.com/oauthjs/node-oauth2-server
Blast Radius: 21.2

Affected Packages