Vulnerability in Oauth2-proxy
CVE-2025-54576
OAuth2-Proxy is an open-source tool that can act as either a standalone reverse proxy or a middleware component integrated into existing reverse proxy or load balancer setups. In versions 7.10.0 and below, oauth2-proxy deployments are vuln…
EPSS: 0.004 (61.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.
Affected products
- Oauth2-proxy — versions < 7.11.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-7rh7-c77v-6434 (x_refsource_CONFIRM)
- https://github.com/oauth2-proxy/oauth2-proxy/commit/9ffafad4b2d2f9f7668e5504565f356a7c047b77 (x_refsource_MISC)
- https://github.com/oauth2-proxy/oauth2-proxy/blob/f4b33b64bd66ad28e9b0d63bea51837b83c00ca1/oauthproxy.go#L582-L584 (x_refsource_MISC)
- https://github.com/oauth2-proxy/oauth2-proxy/blob/f4b33b64bd66ad28e9b0d63bea51837b83c00ca1/pkg/requests/util/util.go#L37-L44 (x_refsource_MISC)
- https://github.com/oauth2-proxy/oauth2-proxy/releases/tag/v7.11.0 (x_refsource_MISC)
- https://oauth2-proxy.github.io/oauth2-proxy/configuration/overview/#proxy-options (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-54576?
- CVE-2025-54576 is a critical-severity vulnerability in Oauth2-proxy, classified under Authentication Bypass by Spoofing. CVSS score: 9.1/10. Published 2025-07-30.
- How severe is CVE-2025-54576?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2025-54576 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.