What is CVE-2017-7631?

CVE-2017-7631 is a medium-severity vulnerability in QNAP Qts, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-03-27.

How severe is CVE-2017-7631?

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

XSS in QNAP Qts

CVE-2017-7631

Cross-site scripting (XSS) vulnerability in the share link function of File Station of QNAP 4.2.6 build 20171026, QTS 4.3.3 build 20170727 and earlier allows remote attackers to inject arbitrary web script or HTML.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2018-03-27 · 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: 0.008 (54.7th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 54.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

QNAP Qts — versions 4.2.6, 4.3.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.qnap.com/zh-tw/security-advisory/nas-201803-23 (Vendor Advisory)

Frequently asked questions

What is CVE-2017-7631?: CVE-2017-7631 is a medium-severity vulnerability in QNAP Qts, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2018-03-27.
How severe is CVE-2017-7631?: Medium severity. CVSS v3 base score is 6.1 out of 10.