What is CVE-2025-58576?

CVE-2025-58576 is a medium-severity vulnerability in Groupsession, classified under Cross-Site Request Forgery (CSRF). CVSS score: 4.3/10. Published 2025-12-12.

How severe is CVE-2025-58576?

Medium severity. CVSS v3 base score is 4.3 out of 10.

CSRF in Groupsession

CVE-2025-58576

Cross-site request forgery vulnerability exists in GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2. If a user accesses a malicious page while logged in, unintended operations may be performed.

Vulnerability class: CSRF (Cross-Site Request Forgery)

Published 2025-12-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N.

EPSS exploit prediction

EPSS: 0.001 (2.0th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 2.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

Groupsession
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-352 — Cross-Site Request Forgery (CSRF)

References

groupsession.jp/info/info-news/security20251208 (Vendor Advisory)
jvn.jp/en/jp/JVN19940619/ (Third Party Advisory)

Frequently asked questions

What is CVE-2025-58576?: CVE-2025-58576 is a medium-severity vulnerability in Groupsession, classified under Cross-Site Request Forgery (CSRF). CVSS score: 4.3/10. Published 2025-12-12.
How severe is CVE-2025-58576?: Medium severity. CVSS v3 base score is 4.3 out of 10.