What is CVE-2021-21411?

CVE-2021-21411 is a medium-severity vulnerability in Oauth2-proxy, classified under Incorrect Authorization. CVSS score: 5.5/10. Published 2021-03-26.

How severe is CVE-2021-21411?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Auth bypass in Oauth2-proxy

CVE-2021-21411

OAuth2-Proxy is an open source reverse proxy that provides authentication with Google, Github or other providers. The `--gitlab-group` flag for group-based authorization in the GitLab provider stopped working in the v7.0.0 release. Regardl…

Vulnerability class: Broken Access Control

EPSS: 0.002 (44.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N.

Affected products

Oauth2-proxy — versions >= 7.0.0, < 7.1.0

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

pkg.go.dev/github.com/oauth2-proxy/oauth2-proxy/v7 (x_refsource_MISC)
github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-652x-m2gr-hppm (x_refsource_CONFIRM)
github.com/oauth2-proxy/oauth2-proxy/commit/0279fa7dff1752f1710707dbd1ffac839de… (x_refsource_MISC)
docs.gitlab.com/ee/user/group/ (x_refsource_MISC)
github.com/oauth2-proxy/oauth2-proxy/releases/tag/v7.1.0 (x_refsource_MISC)

Frequently asked questions

What is CVE-2021-21411?: CVE-2021-21411 is a medium-severity vulnerability in Oauth2-proxy, classified under Incorrect Authorization. CVSS score: 5.5/10. Published 2021-03-26.
How severe is CVE-2021-21411?: Medium severity. CVSS v3 base score is 5.5 out of 10.