Vulnerability Description
In OAuth2 Proxy from version 5.1.1 and less than version 6.0.0, users can provide a redirect address for the proxy to send the authenticated user to at the end of the authentication flow. This is expected to be the original URL that the user was trying to access. This redirect URL is checked within the proxy and validated before redirecting the user to prevent malicious actors providing redirects to potentially harmful sites. This has been fixed in version 6.0.0.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Oauth2 Proxy Project | Oauth2 Proxy | >= 5.1.1, < 6.0.0 |
Related Weaknesses (CWE)
References
- https://github.com/oauth2-proxy/oauth2-proxy/commit/ee5662e0f5001d76ec76562bb605PatchThird Party Advisory
- https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-5m6c-jp6f-Third Party Advisory
- https://github.com/oauth2-proxy/oauth2-proxy/commit/ee5662e0f5001d76ec76562bb605PatchThird Party Advisory
- https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-5m6c-jp6f-Third Party Advisory
FAQ
What is CVE-2020-4037?
CVE-2020-4037 is a vulnerability with a CVSS score of 4.3 (MEDIUM). In OAuth2 Proxy from version 5.1.1 and less than version 6.0.0, users can provide a redirect address for the proxy to send the authenticated user to at the end of the authentication flow. This is expe...
How severe is CVE-2020-4037?
CVE-2020-4037 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-4037?
Check the references section above for vendor advisories and patch information. Affected products include: Oauth2 Proxy Project Oauth2 Proxy.