CVE-2021-21291

Katalog CVE

CVSS 6.1 · Medium EPSS 1,6%

Kerentanan URL Redirection to Untrusted Site ('Open Redirect') pada oauth2 proxy project oauth2 proxy. Skor CVSS 3.1 6.1 (Medium) menurut NVD.

Deskripsi (NVD)

OAuth2 Proxy is an open-source reverse proxy and static file server that provides authentication using Providers (Google, GitHub, and others) to validate accounts by email, domain or group. In OAuth2 Proxy before version 7.0.0, for users that use the whitelist domain feature, a domain that ended in a similar way to the intended domain could have been allowed as a redirect. For example, if a whitelist domain was configured for ".example.com", the intention is that subdomains of example.com are allowed. Instead, "example.com" and "badexample.com" could also match. This is fixed in version 7.0.0 onwards. As a workaround, one can disable the whitelist domain feature and run separate OAuth2 Proxy instances for each subdomain.

Rincian

Terbit di NVD

2 Februari 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

6.1 (Medium), sumber NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-601: URL Redirection to Untrusted Site ('Open Redirect')

EPSS (30 hari)

1,6% peluang dieksploitasi; lebih tinggi dari 74,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://github.com/oauth2-proxy/oauth2-proxy/commit/780ae4f3c99b579cb2ea9845121caebb6192f725 patch · advisory pihak ketiga
• https://github.com/oauth2-proxy/oauth2-proxy/releases/tag/v7.0.0 release notes · advisory pihak ketiga
• https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-4mf2-f3wh-gvf2 exploit · advisory pihak ketiga
• https://pkg.go.dev/github.com/oauth2-proxy/oauth2-proxy/v7 product · advisory pihak ketiga