XSS in QNAP Q\'center
CVE-2021-28807
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
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.014 (71.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 71st percentile — 71.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.014 · newest: 0.014 · change: 0.000
Affected products
- QNAP Q\'center
- QNAP Qts — versions 4.5.3, 4.3.3, 4.3.6
- QNAP Qutscloud — versions c4.5.4
- QNAP Quts Hero — versions h4.5.2
- QNAP Systems Inc. Q’center — versions unspecified
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.qnap.com/zh-tw/security-advisory/qsa-21-20 (Vendor Advisory)
- www.shielder.it/advisories/qnap-qcenter-virtual-stored-xss/ (Exploit, Third Party Advisory)
- www.shielder.it/advisories/qnap-qcenter-post-auth-remote-code-execution-via-qpk… (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-28807?
- CVE-2021-28807 is a high-severity vulnerability in QNAP Q\'center, classified under Cross-site Scripting. CVSS score: 7.7/10. Published 2021-06-03.
- How severe is CVE-2021-28807?
- High severity. CVSS v3 base score is 7.7 out of 10.
- Is CVE-2021-28807 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.