CVE-2021-44053 json
Reflected XSS
published 2022-05-05 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-30912
- cvss
- 5.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.8%
- EPSS 0.8% chance of exploitation in 30 days, percentile 55%
- public exploits
- 0
- none known
Summary
A cross-site scripting (XSS) vulnerability has been reported to affect QNAP device running QTS, QuTS hero and QuTScloud. If exploited, this vulnerability allows remote attackers to inject malicious code. We have already fixed this vulnerability in the following versions of QTS, QuTS hero and QuTScloud: QTS 4.5.4.1991 build 20220329 and later QTS 5.0.0.1986 build 20220324 and later QuTS hero h5.0.0.1986 build 20220324 and later QuTS hero h4.5.4.1971 build 20220310 and later QuTScloud c5.0.1.1949 and later
Patch / fix
- QNAP Systems Inc. QTS 4.5.4.1991 build 20220329, 5.0.0.1986 build 20220324
- QNAP Systems Inc. QuTS hero h4.5.4.1971 build 20220310, h5.0.0.1986 build 20220324
- QNAP Systems Inc. QuTScloud c5.0.1.1949
Exploit prediction
0.76% chance of exploitation in the next 30 days, higher than 55% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 5.7 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:P/A:N |
Affected products
- QNAP Systems Inc. QTS
- QNAP Systems Inc. QuTS hero
- QNAP Systems Inc. QuTScloud
Classification
- Weakness
-
- CWE-79 Improper Neutralization of Input During Web Page Generation
References
-
qnap.com
/en/security-advisory/qsa-22-16
vendor-advisory
Sources
- CVE List CVE-2021-44053
- NVD CVE-2021-44053
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