Synology DSM 7.2 Theme API XSS before 7.2.1-69057-12
CVE-2026-13623 Published on September 18, 2026
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 Analysis
CVE-2026-13623 can be exploited with network access, requires user interaction and user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is a XSS Vulnerability?
The software does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.
CVE-2026-13623 has been classified to as a XSS vulnerability or weakness.
Products Associated with CVE-2026-13623
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Affected Versions
Synology DiskStation Manager (DSM):- Version 7.4 and below 7.4-90075 is affected.
- Version 7.3.2 and below 7.3.2-86009-4 is affected.
- Version 7.2.2 and below 7.2.2-72806-9 is affected.
- Version 7.2.1 and below 7.2.1-69057-12 is affected.
- Before 7.2.1 is unknown.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.