What is CVE-2026-13623?

CVE-2026-13623 is a medium-severity vulnerability in Synology Diskstation Manager (Dsm), classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-09-18.

How severe is CVE-2026-13623?

Medium severity. CVSS v3 base score is 4.8 out of 10.

XSS in Synology Diskstation Manager (Dsm)

CVE-2026-13623

An improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in Theme API in Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 and 7.4-90075 allows remote authenticated users with administrator privileges to read or write limited files.

Vulnerability class: XSS (Cross-Site Scripting)

CVSS v3 metric

CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N.

Affected products

Synology Diskstation Manager (Dsm)

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security@synology.com

Frequently asked questions

What is CVE-2026-13623?: CVE-2026-13623 is a medium-severity vulnerability in Synology Diskstation Manager (Dsm), classified under Cross-site Scripting. CVSS score: 4.8/10. Published 2026-09-18.
How severe is CVE-2026-13623?: Medium severity. CVSS v3 base score is 4.8 out of 10.