CVE-2025-11148: 
JavaScript vulnerability analysis and mitigation

CVE-2025-11148 is a Server-Side Request Forgery (SSRF) vulnerability discovered in Synology Chat versions before 1.1.0-0806. The vulnerability was disclosed and published on August 11, 2017, with the latest modification date being April 19, 2025. This security flaw affects the link preview functionality in Synology Chat, potentially exposing internal network resources to unauthorized access (Synology Advisory).

The vulnerability has been assigned a CVSS v3.0 base score of 6.5 (MEDIUM) with the following vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N. The vulnerability is classified under CWE-918 (Server-Side Request Forgery). The technical nature of the vulnerability involves the link preview feature in Synology Chat, which fails to properly validate input, allowing authenticated users to make requests to internal network resources (SecurityFocus).

The SSRF vulnerability allows remote authenticated users to access intranet resources through unspecified vectors. This could potentially lead to unauthorized access to internal network services and sensitive information disclosure. The vulnerability primarily affects the confidentiality of the system, as indicated by the CVSS metrics showing high impact on confidentiality (C:H) while having no direct impact on integrity (I:N) or availability (A:N) (SecurityFocus).

Synology has addressed this vulnerability in Chat version 1.1.0-0806 and later. Users are strongly advised to update their Synology Chat installation to the latest version to mitigate this security risk (Synology Advisory).