What is CVE-2016-9500?

CVE-2016-9500 is a medium-severity vulnerability in Accellion FTP Server, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 6.1/10. Published 2018-07-13.

How severe is CVE-2016-9500?

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

XSS in Accellion FTP Server

CVE-2016-9500

Accellion FTP server prior to version FTA_9_12_220 uses the Accusoft Prizm Content flash component, which contains multiple parameters (customTabCategoryName, customButton1Image) that are vulnerable to cross-site scripting.

Published 2018-07-13 · 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: 0.054 (92.4th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 92.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.054 · newest: 0.054 · change: 0.000

Affected products

Accellion FTP Server — versions FTA_9_12_220
Accellion FTP Server

Weakness classification (CWE)

References

www.qualys.com/2016/12/06/qsa-2016-12-06/qsa-2016-12-06.pdf (Exploit, Third Party Advisory)
www.securityfocus.com/bid/96154 (VDB Entry, Third Party Advisory, vdb-entry)
www.kb.cert.org/vuls/id/745607 (US Government Resource, Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2016-9500?: CVE-2016-9500 is a medium-severity vulnerability in Accellion FTP Server, classified under Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS). CVSS score: 6.1/10. Published 2018-07-13.
How severe is CVE-2016-9500?: Medium severity. CVSS v3 base score is 6.1 out of 10.