Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Oauth2-Server Project | Oauth2-Server | <= 3.1.1 |
Related Weaknesses (CWE)
References
- https://github.com/oauthjs/node-oauth2-server/blob/91d2cbe70a0eddc53d72def96864eExploitThird Party Advisory
- https://github.com/oauthjs/node-oauth2-server/blob/91d2cbe70a0eddc53d72def96864eExploitThird Party Advisory
- https://github.com/oauthjs/node-oauth2-server/issues/637Issue TrackingThird Party Advisory
- https://tools.ietf.org/html/rfc3986#section-3Third Party Advisory
- https://tools.ietf.org/html/rfc6749#section-3.1.2Third Party Advisory
- https://github.com/oauthjs/node-oauth2-server/blob/91d2cbe70a0eddc53d72def96864eExploitThird Party Advisory
- https://github.com/oauthjs/node-oauth2-server/blob/91d2cbe70a0eddc53d72def96864eExploitThird Party Advisory
- https://github.com/oauthjs/node-oauth2-server/issues/637Issue TrackingThird Party Advisory
- https://tools.ietf.org/html/rfc3986#section-3Third Party Advisory
- https://tools.ietf.org/html/rfc6749#section-3.1.2Third Party Advisory
FAQ
What is CVE-2020-26938?
CVE-2020-26938 is a vulnerability with a CVSS score of 7.2 (HIGH). 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...
How severe is CVE-2020-26938?
CVE-2020-26938 has been rated HIGH with a CVSS base score of 7.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-26938?
Check the references section above for vendor advisories and patch information. Affected products include: Oauth2-Server Project Oauth2-Server.