Medium severity4.3NVD Advisory· Published Jun 29, 2020· Updated Jun 17, 2026
CVE-2020-4037
CVE-2020-4037
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.
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LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/oauth2-proxy/oauth2-proxyGo | >= 5.1.1, < 6.0.0 | 6.0.0 |
Affected products
4cpe:2.3:a:oauth2_proxy_project:oauth2_proxy:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:oauth2_proxy_project:oauth2_proxy:*:*:*:*:*:*:*:*range: >=5.1.1,<6.0.0
- (no CPE)range: >= 5.1.1, < 6.0.0
- osv-coords2 versions
>= 5.1.1, < 6.0.0+ 1 more
- (no CPE)range: >= 5.1.1, < 6.0.0
- (no CPE)range: >= 5.1.1, < 6.0.0
Patches
Vulnerability mechanics
References
5- github.com/oauth2-proxy/oauth2-proxy/commit/ee5662e0f5001d76ec76562bb605abbd07c266a2nvdPatchThird Party AdvisoryWEB
- github.com/advisories/GHSA-5m6c-jp6f-2vcvghsaADVISORY
- github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-5m6c-jp6f-2vcvnvdThird Party AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2020-4037ghsaADVISORY
- github.com/oauth2-proxy/oauth2-proxy/releases/tag/v6.0.0ghsaWEB
News mentions
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