CVE-2021-28803

Stored XSS Vulnerability in Q'center

View on CVE.org

Published Jul 1, 2021 CVSS 3.1 · 5.4 Medium EPSS < 1% KEV · Not listed

Description

This issue affects: QNAP Systems Inc. Q'center versions prior to 1.11.1004.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

QNAP Systems Inc.

Q'center

affected

Version	Status	Constraints
`unspecified`	affected	< 1.11.1004

Configuration 1 [-]

cpe:2.3:a:qnap:q\'center:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

Vendor Solution

QNAP have already fixed this vulnerability in the following versions: Q'center 1.11.1004 and later

Tracking

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Advisories

Source	ID	Title
EUVD	EUVD-2021-15459	This issue affects: QNAP Systems Inc. Q'center versions prior to 1.11.1004.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction Required

No CVSS v3.0

Access Vector Network

Access Complexity Medium

Authentication Single

Confidentiality Impact None

Integrity Impact Partial

Availability Impact None

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.466% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://www.qnap.com/zh-tw/security-advisory/qsa-21-31

History

Jul 12, 2025 1:45 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics	epss `{'score': 0.00502}`	epss `{'score': 0.00302}`

Subscriptions

Qnap Q\'center

Weaknesses

Sources

CVE record Updated: Sep 16, 2024, 5:34 PM

Status: PUBLISHED
Assigner: qnap
Published: Jul 1, 2021, 2:00 AM
Updated: Sep 16, 2024, 5:34 PM
Reserved: Mar 18, 2021, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 3:46 AM

Status: Modified
Published: Jul 1, 2021, 2:15 AM
Modified: Jun 17, 2026, 3:46 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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