Synology Chat Server 2.4.5-22148 XSS: Authenticated UI can read/write files
CVE-2026-40541 Published on August 28, 2026
An improper neutralization of input during web page generation ('Cross-site Scripting') vulnerability in extract domain in Synology Chat Server before 2.4.5-22148 allows remote authenticated users, via a UI interaction, to read or write arbitrary files and conduct denial-of-service attacks in DSM.
Vulnerability Analysis
CVE-2026-40541 can be exploited with network access, requires user interaction and a small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to be critical as this vulnerability has a high impact to the confidentiality, integrity and availability of this component.
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-2026-40541 has been classified to as a XSS vulnerability or weakness.
Affected Versions
Synology Chat Server:- Version * and below 2.4.5-22148 is affected.