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 v4.0: 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/E:U/U:Green
CVE-ID: CVE-2025-61950
CWE-ID: CWE-639
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Japan Total System
Affected software:
GroupSession Free edition
GroupSession byCloud
GroupSession ZION
GroupSession Free edition
GroupSession byCloud
GroupSession ZION
Detailed vulnerability description
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.
How to mitigate CVE-2025-61950
Install updates from vendor's website.