XSS in QNAP Qts
CVE-2021-28806
A DOM-based XSS vulnerability has been reported to affect QNAP NAS running QTS and QuTS hero. If exploited, this vulnerability allows attackers to inject malicious code. This issue affects: QNAP Systems Inc. QTS versions prior to 4.5.3.1652 Build 20210428. QNAP Systems Inc. QuTS hero versions prior to h4.5.2.1638 Build 20210414. QNAP Systems Inc. QuTScloud versions prior to c4.5.5.1656 Build 20210503. This issue does not affect: QNAP Systems Inc. QTS 4.3.6; 4.3.3.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.005 (40.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N.
Affected products
- Qnap Qts
- Qnap Qutscloud
- Qnap Quts_hero
- Qnap Systems Inc. Qts — versions unspecified, 4.3.6, 4.3.3
- Qnap Systems Inc. Qutscloud — versions unspecified
- Qnap Systems Inc. Quts Hero — versions unspecified
Weakness classification (CWE)
References
- security@qnapsecurity.com.tw (x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-28806?
- CVE-2021-28806 is a medium-severity vulnerability in QNAP Qts, classified under Cross-site Scripting. CVSS score: 5.7/10. Published 2021-06-03.
- How severe is CVE-2021-28806?
- Medium severity. CVSS v3 base score is 5.7 out of 10.