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01 Record

CVE-2021-44053

Reflected XSS

MediumPUBLISHEDCNA: qnap
CNA base score5.7 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N

02 Description

Reflected XSS

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
0.75% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 54.8% of scored records. A rank, not a probability.
NVD base score
6.1 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2022-05-05 16:50Z4 YR AGO
Last updated
2024-09-16 19:31Z2 YR AGO
Reserved
2021-11-19
Assigning CNA
qnap
Record state
PUBLISHED
Severity
Medium (CVSS 5.7)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N
Weaknesses
  • CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base
Data version
5.1
Document digest
04a087cbec2d2a7da970dab317fb2f5c9ffd7a916307f0997dcbe983c1c81927

05 Affected products

VendorProductVersionsPlatforms
QNAP Systems Inc.QTS< 4.5.4.1991 build 20220329, < 5.0.0.1986 build 20220324—
QNAP Systems Inc.QuTS hero< h5.0.0.1986 build 20220324, < h4.5.4.1971 build 20220310—
QNAP Systems Inc.QuTScloud< c5.0.1.1949—

06 References

07 Remediation

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