---
id: CVE-2023-3971
title: 'Controller: html injection in custom login info'
summary: >-
  An HTML injection flaw was found in Controller in the user interface settings.
  This flaw allows an attacker to capture credentials by creating a custom login
  page by injecting HTML, resulting in a complete compromise.
severity: high
cvss: 7.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-80
vendor: Red Hat
product: automation-controller
affected:
  - automation-controller (all versions)
  - automation-controller (all versions)
  - automation-controller (all versions)
  - automation-controller (all versions)
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2024-04-26T19:46:29.640652Z'
exploitAvailable: true
published: '2023-10-04'
updated: '2026-11-07'
sourceUpdated: '2026-11-07T11:32:44.509Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2023-3971'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2023:4340'
    label: 'RHSA-2023:4340'
  - url: 'https://access.redhat.com/errata/RHSA-2023:4590'
    label: 'RHSA-2023:4590'
  - url: 'https://access.redhat.com/security/cve/CVE-2023-3971'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2226965'
    label: RHBZ#2226965
tags:
  - cve.org
  - exploit-available
epss: 0.00816
epssPercentile: 0.57317
exploits:
  github: 1
  githubRepos:
    - 'https://github.com/ashangp923/CVE-2023-3971'
  checkedAt: '2026-11-07T17:43:13.280Z'
ingestedAt: '2026-11-07T12:16:41.107Z'
---

## Overview

An HTML injection flaw was found in Controller in the user interface settings. This flaw allows an attacker to capture credentials by creating a custom login page by injecting HTML, resulting in a complete compromise.

## Affected

- `automation-controller (all versions)`
- `automation-controller (all versions)`
- `automation-controller (all versions)`
- `automation-controller (all versions)`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.