What is CVE-2017-9523?

CVE-2017-9523 is a medium-severity vulnerability in Sophos Web Appliance, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-06-09.

How severe is CVE-2017-9523?

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

XSS in Sophos Web Appliance

CVE-2017-9523

The Sophos Web Appliance before 4.3.2 has XSS in the FTP redirect page, aka NSWA-1342.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2017-06-09 · 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: 0.012 (66.0th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Sophos Web Appliance

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

swa.sophos.com/rn/swa/concepts/ReleaseNotes_4.3.2.html (Release Notes, Vendor Advisory)
www.securityfocus.com/bid/99016 (vdb-entry)

Frequently asked questions

What is CVE-2017-9523?: CVE-2017-9523 is a medium-severity vulnerability in Sophos Web Appliance, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-06-09.
How severe is CVE-2017-9523?: Medium severity. CVSS v3 base score is 6.1 out of 10.