What is CVE-2019-11827?

CVE-2019-11827 is a medium-severity vulnerability in Synology Note Station, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2019-06-30.

How severe is CVE-2019-11827?

Medium severity. CVSS v3 base score is 6.5 out of 10.

XSS in Synology Note Station

CVE-2019-11827

Cross-site scripting (XSS) vulnerability in SYNO.NoteStation.Shard in Synology Note Station before 2.5.3-0863 allows remote attackers to inject arbitrary web script or HTML via the object_id parameter.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2019-06-30 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.008 (55.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 55th percentile — 55.0% 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

Synology Note Station — versions unspecified
Synology Note Station

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.synology.com/security/advisory/Synology_SA_19_08 (Vendor Advisory)

Frequently asked questions

What is CVE-2019-11827?: CVE-2019-11827 is a medium-severity vulnerability in Synology Note Station, classified under Cross-site Scripting. CVSS score: 6.5/10. Published 2019-06-30.
How severe is CVE-2019-11827?: Medium severity. CVSS v3 base score is 6.5 out of 10.