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CVE-2025-61950

Published: Dec 12, 2025Updated: Feb 17, 2026 Sources: CVE List NVDCWE-639
NVD MITRE
4.3CVSSMEDIUM
EPSS Score
0.2%
Top 93.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

In GroupSession, a Circular notice can be created with its memo field non-editable, but the authorization check is improperly implemented. With some crafted request, a logged-in user may alter the memo field. The affected products and versions are GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:UC:NI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-639

Affected Products

groupsessiongroupsession
On-prem
Enterprise Software / collaboration-groupware
GroupSession Free editionJapan Total System Co.,Ltd.
On-prem
Enterprise Software / collaboration-groupware
GroupSession byCloudJapan Total System Co.,Ltd.
On-prem
Enterprise Software / collaboration-groupware
GroupSession ZIONJapan Total System Co.,Ltd.
On-prem
Enterprise Software / collaboration-groupware
groupsessioncommercialJPEnterprise Software
japan total system co.,ltd.commercialJPEnterprise Softwareaka groupsession bycloud, groupsession free edition, groupsession zion

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Initial Access
View detailed technique mapping

References

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

Timeline

Published
Dec 12, 2025
Last Updated
Feb 17, 2026

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