Vulnerability Details : CVE-2020-4037
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.
Vulnerability category: Open redirect
Products affected by CVE-2020-4037
- cpe:2.3:a:oauth2_proxy_project:oauth2_proxy:*:*:*:*:*:*:*:*
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
-
The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.Assigned by: security-advisories@github.com (Primary)
References for CVE-2020-4037
-
https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-5m6c-jp6f-2vcv
New OpenRedirect cases have been found · Advisory · oauth2-proxy/oauth2-proxy · GitHubThird Party Advisory
-
https://github.com/oauth2-proxy/oauth2-proxy/commit/ee5662e0f5001d76ec76562bb605abbd07c266a2
Merge pull request from GHSA-5m6c-jp6f-2vcv · oauth2-proxy/oauth2-proxy@ee5662e · GitHubPatch;Third Party Advisory
Jump to