CVE-2025-66284: Japan Total System Co.,Ltd. GroupSession Free edition vulnerability
Japan Total System Co.,Ltd. · GroupSession Free edition
Affected: Japan Total System Co.,Ltd. GroupSession Free edition · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 8% of scored CVEs
DescriptionCVE.org
Stored cross-site scripting vulnerabilities exist in GroupSession Free edition prior to ver5.7.1, GroupSession byCloud prior to ver5.7.1, and GroupSession ZION prior to ver5.7.1. A logged-in user can prepare a malicious page or URL, and an arbitrary script may be executed on the web browser when another user accesses it.
Affected products3
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Japan Total System Co.,Ltd. · GroupSession Free editionprior to ver5.7.1
- Japan Total System Co.,Ltd. · GroupSession byCloudprior to ver5.7.1
- Japan Total System Co.,Ltd. · GroupSession ZIONprior to ver5.7.1
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Weakness
- Cross-site Scripting
- Published
- December 2025
CoverageNo articles yet
No CyberSIXT article names CVE-2025-66284 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.