4.9
CVSSv2

CVE-2021-29456

Published: 21/04/2021 Updated: 27/04/2021
CVSS v2 Base Score: 4.9 | Impact Score: 4.9 | Exploitability Score: 6.8
CVSS v3 Base Score: 5.4 | Impact Score: 2.7 | Exploitability Score: 2.3
VMScore: 436
Vector: AV:N/AC:M/Au:S/C:P/I:P/A:N

Vulnerability Summary

Authelia is an open-source authentication and authorization server providing 2-factor authentication and single sign-on (SSO) for your applications via a web portal. In versions 4.27.4 and previous versions, utilizing a HTTP query parameter an attacker is able to redirect users from the web application to any domain, including potentially malicious sites. This security issue does not directly impact the security of the web application itself. As a workaround, one can use a reverse proxy to strip the query parameter from the affected endpoint. There is a patch for version 4.28.0.

Vulnerability Trend

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