XSS in Groupsession
CVE-2025-57883
Reflected cross-site scripting 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 crafted page or URL, an arbitrary scr…
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.002 (6.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
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)
References
- vultures@jpcert.or.jp (Vendor Advisory)
- vultures@jpcert.or.jp (Third Party Advisory)
Frequently asked questions
- What is CVE-2025-57883?
- CVE-2025-57883 is a medium-severity vulnerability in Groupsession, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2025-12-12.
- How severe is CVE-2025-57883?
- Medium severity. CVSS v3 base score is 6.1 out of 10.