Detections
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SCA: security update for github.com/authelia/authelia/v4 (GHSA-36f2-fcrx-fp4j)

medium Tenable Self-Hosted Container Security Plugin ID 434535

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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. (CVE-2021-29456)

See Also

https://github.com/advisories/GHSA-36f2-fcrx-fp4j

Plugin Details

Severity: Medium

ID: 434535

Version: Revision 1.6

Type: Local

Family: SCA Checks

Published: 8/19/2025

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 2.3

Percentile: 9.07

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

Vector: CVSS2#AV:N/AC:M/Au:S/C:P/I:P/A:N

CVSS Score Source: CVE-2021-29456

CVSS v3

Risk Factor: Medium

Base Score: 5.4

Temporal Score: 4.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 3/16/2023

Vulnerability Publication Date: 4/21/2021

Reference Information

CVE: CVE-2021-29456

cwe: CWE-601