What is CVE-2018-0711?

CVE-2018-0711 is a medium-severity vulnerability in QNAP Qts, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-04-30.

How severe is CVE-2018-0711?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in QNAP Qts

CVE-2018-0711

Cross-site scripting (XSS) vulnerability in QNAP QTS 4.3.3 build 20180126, QTS 4.3.4 build 20180315, and their earlier versions could allow remote attackers to inject arbitrary web script or HTML.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-04-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.009 (57.2th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 57.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: -0.000

Affected products

QNAP Qts — versions 4.3.4.0526, 4.3.4.0557, 4.3.4.0561

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.qnap.com/zh-tw/security-advisory/nas-201804-27 (Vendor Advisory)
www.securitytracker.com/id/1040779 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2018-0711?: CVE-2018-0711 is a medium-severity vulnerability in QNAP Qts, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-04-30.
How severe is CVE-2018-0711?: Medium severity. CVSS v3 base score is 6.1 out of 10.