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Case File

CVE-2020-4037

MEDIUM · CVSS 4.3 EPSS 0.90% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2020-06-29 · Last synced 2026-08-04

CyberRota Analysis

AI analysis pending.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links
github.com ↗ github.com ↗

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2020-4037
Severity
MEDIUM
CVSS
4.3
EPSS
0.90%

Original NVD 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.