What is CVE-2017-16950?

CVE-2017-16950 is a medium-severity vulnerability in Urbackup Server, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-12-17.

How severe is CVE-2017-16950?

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

XSS in Urbackup Server

CVE-2017-16950

Cross - site scripting (XSS) vulnerability in UrBackup Server before 2.1.20 allows remote attackers to inject arbitrary web script or HTML via the action parameter.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2017-12-17 · 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 (53.7th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.7% 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

Urbackup Server

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.urbackup.org/server_changelog.html (Release Notes, Vendor Advisory)
www.urbackup.org/2017/11/30/urbackup-server-2.1.20.html (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2017-16950?: CVE-2017-16950 is a medium-severity vulnerability in Urbackup Server, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2017-12-17.
How severe is CVE-2017-16950?: Medium severity. CVSS v3 base score is 6.1 out of 10.