XSS in QNAP Qts
CVE-2021-44053
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
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.008 (53.5th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.008 · change: +0.000
Affected products
- QNAP Qts — versions 4.2.6
- QNAP Qutscloud
- QNAP Quts Hero
- QNAP Systems Inc. Qts — versions unspecified
- QNAP Systems Inc. Qutscloud — versions unspecified
- QNAP Systems Inc. Quts Hero — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.qnap.com/en/security-advisory/qsa-22-16 (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-44053?
- CVE-2021-44053 is a medium-severity vulnerability in QNAP Qts, classified under Cross-site Scripting. CVSS score: 5.7/10. Published 2022-05-05.
- How severe is CVE-2021-44053?
- Medium severity. CVSS v3 base score is 5.7 out of 10.
- Is CVE-2021-44053 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.