What is CVE-2025-61987?

CVE-2025-61987 is a medium-severity vulnerability in Japan Total System Co.,ltd. Groupsession Bycloud, classified under CWE-1385. CVSS score: 5.3/10. Published 2025-12-12.

How severe is CVE-2025-61987?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Japan Total System Co.,ltd. Groupsession Bycloud

CVE-2025-61987

GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2. do not validate origins in WebSockets. If a user accesses a crafted page, Chat information sent to the user may b…

EPSS: 0.000 (3.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Japan Total System Co.,ltd. Groupsession Bycloud — versions prior to ver5.3.3
Japan Total System Co.,ltd. Groupsession Free Edition — versions prior to ver5.3.0
Japan Total System Co.,ltd. Groupsession Zion — versions prior to ver5.3.2

Weakness classification (CWE)

CWE-1385

References

Frequently asked questions

What is CVE-2025-61987?: CVE-2025-61987 is a medium-severity vulnerability in Japan Total System Co.,ltd. Groupsession Bycloud, classified under CWE-1385. CVSS score: 5.3/10. Published 2025-12-12.
How severe is CVE-2025-61987?: Medium severity. CVSS v3 base score is 5.3 out of 10.