CVE-2021-28807

Post-Authentication Reflected XSS Vulnerability in Q'center

MEDIUM
5.4
CVSS Score
Published: June 3, 2021 at 02:45 AM UTC
Updated: June 17, 2026 at 03:46 AM UTC
4 products affected across 1 vendorQ’centerQTSQuTS hero

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Severity
MEDIUM5.4
Exploit prediction
EPSS 1%

Description

A post-authentication reflected XSS vulnerability has been reported to affect QNAP NAS running Q’center. If exploited, this vulnerability allows remote attackers to inject malicious code. QNAP have already fixed this vulnerability in the following versions of Q’center: QTS 4.5.3: Q’center v1.12.1012 and later QTS 4.3.6: Q’center v1.10.1004 and later QTS 4.3.3: Q’center v1.10.1004 and later QuTS hero h4.5.2: Q’center v1.12.1012 and later QuTScloud c4.5.4: Q’center v1.12.1012 and later

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 1.10.1004v < 1.12.1012v < v1.10.1004v < v1.12.1012
Affected range stops below 1.10.1004, so it looks safe — our inference, not a vendor statement
Affected range stops below 1.12.1012, so it looks safe — our inference, not a vendor statement
Affected range stops below v1.10.1004, so it looks safe — our inference, not a vendor statement
Affected range stops below v1.12.1012, so it looks safe — our inference, not a vendor statement
qnap-qts (environment) · qnap-quts-hero (environment) · qnap-qutscloud (environment)
80%
All versions
All versions
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-79

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