What’s Vulnerable › Vulnerabilities
CVE-2025-64781
- Severity: medium (CVSS 5.1 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2025-12-12 · updated 2026-10-07
- Weakness: CWE-1188
Description
In GroupSession Free edition prior to ver5.7.1, GroupSession byCloud prior to ver5.7.1, and GroupSession ZION prior to ver5.7.1, "External page display restriction" is set to "Do not limit" in the initial configuration. With this configuration, the user may be redirected to an arbitrary website when accessing a specially crafted URL.
Affected products
- Japan Total System Co.,Ltd. GroupSession: before 5.7.1 — fixed in 5.7.1
How to fix
Upgrade to a fixed version: Japan Total System Co.,Ltd. GroupSession 5.7.1. Check the vendor advisory for mitigations.
References
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