Server-Side Request Forgery (SSRF) in Group Office - CVE-2026-25511
Published: April 24, 2026 / Updated: April 24, 2026
Vulnerability identifier: #VU127527
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P/U:Clear
CVE-ID: CVE-2026-25511
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: Intermesh BV
Affected software:
Group Office
Group Office
Detailed vulnerability description
The disclosed vulnerability allows a remote user to perform SSRF attacks.
The vulnerability exists due to insufficient validation of user-supplied input within the WOPI service discovery URL. A remote administrator can send a specially crafted HTTP request and trick the application to initiate requests to arbitrary systems.
Successful exploitation of this vulnerability may allow a remote attacker gain access to sensitive data, located in the local network or send malicious requests to other servers from the vulnerable system.
How to mitigate CVE-2026-25511
Install updates from vendor's website.