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I. Basic Information for CVE-2021-29456
Vulnerability Information

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Vulnerability Title
Authelia allows open redirects on the logout endpoint
Source: NVD (National Vulnerability Database)
Vulnerability Description
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 earlier, 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Github authelia 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Github authelia是美国Github公司的一个应用软件。一个开源身份验证和授权服务器,可通过Web门户为应用程序提供2要素身份验证和单点登录(SSO)。 Authelia 4.27.4版本及之前版本存在输入验证错误漏洞,攻击者可利用该漏洞可以利用HTTP查询参数将用户从web应用程序重定向到任何域,包括潜在的恶意站点。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
VendorProductAffected VersionsCPESubscribe
autheliaauthelia <= 4.27.4 -
II. Public POCs for CVE-2021-29456
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III. Intelligence Information for CVE-2021-29456
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