CVE-2026-13623: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Synology DiskStation Manager (DSM)
CVE-2026-13623 is a cross-site scripting (XSS) vulnerability in the Theme API of Synology DiskStation Manager (DSM). It affects versions prior to 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, and 7.4-90075. The flaw allows remote authenticated users with administrator privileges to read or write limited files via improper input neutralization during web page generation. The vulnerability has a medium severity rating with a CVSS score of 4.8.
AI Analysis
Technical Summary
This vulnerability involves improper neutralization of input during web page generation in the Theme API component of Synology DiskStation Manager (DSM). Authenticated users with administrator privileges can exploit this cross-site scripting (XSS) flaw to read or write certain files. The issue affects multiple DSM versions before specific patch releases: versions prior to 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, and 7.4-90075. The CVSS 3.1 vector indicates network attack vector, low attack complexity, high privileges required, user interaction required, scope changed, and low confidentiality and integrity impact with no availability impact.
Potential Impact
The vulnerability allows remote authenticated administrators to perform cross-site scripting attacks that can lead to reading or writing limited files on the affected system. This could potentially compromise confidentiality and integrity of some data. There is no indication of availability impact or known exploits in the wild at this time.
Mitigation Recommendations
A fix is available in Synology DiskStation Manager versions 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, and 7.4-90075. Users should upgrade to these or later versions to remediate the vulnerability. No additional mitigation steps are indicated.
CVE-2026-13623: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in Synology DiskStation Manager (DSM)
Description
CVE-2026-13623 is a cross-site scripting (XSS) vulnerability in the Theme API of Synology DiskStation Manager (DSM). It affects versions prior to 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, and 7.4-90075. The flaw allows remote authenticated users with administrator privileges to read or write limited files via improper input neutralization during web page generation. The vulnerability has a medium severity rating with a CVSS score of 4.8.
CVSS v3.1
Score 4.8medium
Affected software
Synology
DiskStation Manager (DSM)
pkg:rpm/synology/diskstation-managerRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves improper neutralization of input during web page generation in the Theme API component of Synology DiskStation Manager (DSM). Authenticated users with administrator privileges can exploit this cross-site scripting (XSS) flaw to read or write certain files. The issue affects multiple DSM versions before specific patch releases: versions prior to 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, and 7.4-90075. The CVSS 3.1 vector indicates network attack vector, low attack complexity, high privileges required, user interaction required, scope changed, and low confidentiality and integrity impact with no availability impact.
Potential Impact
The vulnerability allows remote authenticated administrators to perform cross-site scripting attacks that can lead to reading or writing limited files on the affected system. This could potentially compromise confidentiality and integrity of some data. There is no indication of availability impact or known exploits in the wild at this time.
Mitigation Recommendations
A fix is available in Synology DiskStation Manager versions 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, and 7.4-90075. Users should upgrade to these or later versions to remediate the vulnerability. No additional mitigation steps are indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- synology
- Date Reserved
- 2026-06-29T09:42:48.084Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6aadb77455bf5e2cf59e642f
Added to database: 09/18/2026, 22:13:08 UTC
Last enriched: 09/18/2026, 22:16:08 UTC
Last updated: 09/19/2026, 03:06:51 UTC
Views: 7
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