CVEvulnerability
CVE-2020-26938
7.2 HIGH
Official page ↗
- Status
- Modified
- Published
- 2022-08-29
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.2 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
- Weaknesses
- CWE-601
Description
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 configurations
• oauth2-server project oauth2-server (<= 3.1.1)
Related
Weakness · CWE (1)
- CWE-601 URL Redirection to Untrusted Site weakness
References
- https://github.com/oauthjs/node-oauth2-server/blob/91d2cbe70a0eddc53d72def96864e2de0fd41703/lib/grant-types/authorization-code-grant-type.js#L143 Exploit, Third Party Advisory
- https://github.com/oauthjs/node-oauth2-server/blob/91d2cbe70a0eddc53d72def96864e2de0fd41703/lib/validator/is.js#L12 Exploit, Third Party Advisory
- https://github.com/oauthjs/node-oauth2-server/issues/637 Issue Tracking, Third Party Advisory
- https://tools.ietf.org/html/rfc3986#section-3 Third Party Advisory
- https://tools.ietf.org/html/rfc6749#section-3.1.2 Third Party Advisory
- https://github.com/oauthjs/node-oauth2-server/blob/91d2cbe70a0eddc53d72def96864e2de0fd41703/lib/grant-types/authorization-code-grant-type.js#L143 Exploit, Third Party Advisory
- https://github.com/oauthjs/node-oauth2-server/blob/91d2cbe70a0eddc53d72def96864e2de0fd41703/lib/validator/is.js#L12 Exploit, Third Party Advisory
- https://github.com/oauthjs/node-oauth2-server/issues/637 Issue Tracking, Third Party Advisory
- https://tools.ietf.org/html/rfc3986#section-3 Third Party Advisory
- https://tools.ietf.org/html/rfc6749#section-3.1.2 Third Party Advisory