Stored Cross-Site Scripting Vulnerability in GroupSession by GroupSession Co.
CVE-2025-54407

5.1MEDIUM

Key Information:

Vendor

Japan Total System Co.,ltd.

Status
Groupsession Free Edition
Groupsession Bycloud
Groupsession Zion
Vendor
CVE Published:
12 December 2025

What is CVE-2025-54407?

A stored cross-site scripting vulnerability was identified in multiple versions of GroupSession products. This flaw allows an attacker to execute arbitrary scripts in the web browser of users who access a specially crafted page or URL. Unpatched versions, including the Free edition and GroupSession byCloud and ZION, expose users to potential data theft and session hijacking risks. It is crucial for users to update to the latest versions to mitigate this security threat.

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Affected Version(s)

GroupSession byCloud prior to ver5.3.3

GroupSession Free edition prior to ver5.3.0

GroupSession ZION prior to ver5.3.2

References

https://groupsession.jp/info/info-news/security20251208
https://jvn.jp/en/jp/JVN19940619/

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

CVSS V3.0

Score:
6.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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