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.
Published 2020-06-29 20:15:10
Updated 2020-07-07 18:40:26
Source GitHub, Inc.
View at NVD,   CVE.org
Vulnerability category: Open redirect

Products affected by CVE-2020-4037

Exploit prediction scoring system (EPSS) score for CVE-2020-4037

0.07%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 28 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2020-4037

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.8
MEDIUM AV:N/AC:M/Au:N/C:P/I:P/A:N
8.6
4.9
NIST
5.4
MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
2.8
2.5
NIST
4.3
MEDIUM CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
2.8
1.4
GitHub, Inc.

CWE ids for CVE-2020-4037

References for CVE-2020-4037

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