Main Vulnerability Database Vulnerabilities #VU119244

Authorization bypass through user-controlled key in Japan Total System products - CVE-2025-61950

Published: December 8, 2025

Vulnerability identifier: #VU119244

CSH Severity: Medium

CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2025-61950

CWE-ID: CWE-639

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to authorization bypass through user-controlled key. A remote user can alter the memo of Circular notice.

GroupSession Free edition
GroupSession ZION
GroupSession byCloud

Install updates from vendor's website.

GroupSession Free edition - update to 5.3.0
GroupSession ZION - update to 5.3.2
GroupSession byCloud - update to 5.3.3