Insecure Default Initialization of Resource in Japan Total System products - CVE-2025-64781
Published: December 8, 2025
Vulnerability identifier: #VU119247
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N]
CVE-ID: CVE-2025-64781
CWE-ID: CWE-1188
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 initialization of a resource with an insecure default. A remote attacker can trick a victim to access a specially crafted URL and redirect them to an arbitrary website.
Affected software
GroupSession Free edition
GroupSession byCloud
GroupSession ZION
GroupSession byCloud
GroupSession ZION
How to mitigate CVE-2025-64781
Install updates from vendor's website.
GroupSession Free edition - update to 5.7.1
GroupSession byCloud - update to 5.7.1
GroupSession ZION - update to 5.7.1
GroupSession byCloud - update to 5.7.1
GroupSession ZION - update to 5.7.1