Vulnerability in Oauth2-proxy
CVE-2025-64484
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 prior to 7.13.0, all deployments of OAuth2 Proxy in…
EPSS: 0.000 (12.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N.
Affected products
- Oauth2-proxy — versions < 7.13.0
Weakness classification (CWE)
References
- https://github.com/oauth2-proxy/oauth2-proxy/security/advisories/GHSA-vjrc-mh2v-45x6 (x_refsource_CONFIRM)
- https://datatracker.ietf.org/doc/html/rfc2616#section-4.2 (x_refsource_MISC)
- https://datatracker.ietf.org/doc/html/rfc822#section-3.2 (x_refsource_MISC)
- https://github.security.telekom.com/2020/05/smuggling-http-headers-through-reverse-proxies.html (x_refsource_MISC)
- https://www.uptimia.com/questions/why-are-http-headers-with-underscores-dropped-by-nginx (x_refsource_MISC)
Frequently asked questions
- What is CVE-2025-64484?
- CVE-2025-64484 is a high-severity vulnerability in Oauth2-proxy, classified under Improper Neutralization of HTTP Headers for Scripting Syntax. CVSS score: 8.5/10. Published 2025-11-10.
- How severe is CVE-2025-64484?
- High severity. CVSS v3 base score is 8.5 out of 10.