What is CVE-2017-16775?

CVE-2017-16775 is a high-severity vulnerability in Synology Sso Server, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 7.1/10. Published 2019-04-01.

How severe is CVE-2017-16775?

High severity. CVSS v3 base score is 7.1 out of 10.

Improper input validation in Synology Sso Server

CVE-2017-16775

Improper restriction of rendered UI layers or frames vulnerability in SSOOauth.cgi in Synology SSO Server before 2.1.3-0129 allows remote attackers to conduct clickjacking attacks via unspecified vectors.

Published 2019-04-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.011 (63.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Synology Sso Server — versions unspecified
Synology Sso Server

Weakness classification (CWE)

References

www.synology.com/security/advisory/Synology_SA_18_28 (Vendor Advisory)

Frequently asked questions

What is CVE-2017-16775?: CVE-2017-16775 is a high-severity vulnerability in Synology Sso Server, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 7.1/10. Published 2019-04-01.
How severe is CVE-2017-16775?: High severity. CVSS v3 base score is 7.1 out of 10.