CVE-2025-61987

GroupSession Free edition prior to ver5.3.0, GroupSession byCloud prior to ver5.3.3, and GroupSession ZION prior to ver5.3.2. do not validate origins in WebSockets. If a user accesses a crafted page, Chat information sent to the user may be exposed.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://groupsession.jp/info/info-news/security20251208	Vendor Advisory
https://jvn.jp/en/jp/JVN19940619/	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:groupsession:groupsession:::::free:::*
	cpe:2.3:a:groupsession:groupsession:::::zion:::*
	cpe:2.3:a:groupsession:groupsession:::::bycloud:::*

History

17 Feb 2026, 15:31

Type	Values Removed	Values Added
CPE		cpe:2.3:a:groupsession:groupsession:::::free:::* cpe:2.3:a:groupsession:groupsession:::::zion:::* cpe:2.3:a:groupsession:groupsession:::::bycloud:::*
References	~~() https://groupsession.jp/info/info-news/security20251208 -~~	() https://groupsession.jp/info/info-news/security20251208 - Vendor Advisory
References	~~() https://jvn.jp/en/jp/JVN19940619/ -~~	() https://jvn.jp/en/jp/JVN19940619/ - Third Party Advisory
First Time		Groupsession Groupsession groupsession

12 Dec 2025, 05:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-12-12 05:16

Updated : 2026-02-17 15:31

NVD link : CVE-2025-61987

Mitre link : CVE-2025-61987

CVE.ORG link : CVE-2025-61987

JSON object : View

Products Affected

groupsession

groupsession

CWE

CWE-1385

Missing Origin Validation in WebSockets

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