What’s Vulnerable › Vulnerabilities

CVE-2021-28803: Stored XSS Vulnerability in Q'center

• Severity: medium (CVSS 5.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-07-01 · updated 2026-06-17
• Weakness: CWE-80

Description

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

Affected products

• QNAP Q'Center: before 1.11.1004 — fixed in 1.11.1004

How to fix

Upgrade to a fixed version: QNAP Q'Center 1.11.1004. Check the vendor advisory for mitigations.

References

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

Get alerted when CVE-2021-28803 or the next vulnerability affects your stack