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Vulnerability Details :

CVE-2025-61987

Summary
Assigner-jpcert
Assigner Org ID-ede6fdc4-6654-4307-a26d-3331c018e2ce
Published At-12 Dec, 2025 | 05:02
Updated At-12 Dec, 2025 | 20:22
Rejected At-
Credits

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.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:jpcert
Assigner Org ID:ede6fdc4-6654-4307-a26d-3331c018e2ce
Published At:12 Dec, 2025 | 05:02
Updated At:12 Dec, 2025 | 20:22
Rejected At:
▼CVE Numbering Authority (CNA)

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.

Affected Products
Vendor
Japan Total System Co.,Ltd.
Product
GroupSession Free edition
Versions
Affected
  • prior to ver5.3.0
Vendor
Japan Total System Co.,Ltd.
Product
GroupSession byCloud
Versions
Affected
  • prior to ver5.3.3
Vendor
Japan Total System Co.,Ltd.
Product
GroupSession ZION
Versions
Affected
  • prior to ver5.3.2
Problem Types
TypeCWE IDDescription
CWECWE-1385Missing origin validation in WebSockets
Type: CWE
CWE ID: CWE-1385
Description: Missing origin validation in WebSockets
Metrics
VersionBase scoreBase severityVector
3.05.3MEDIUM
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
4.06.9MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Version: 3.0
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Version: 4.0
Base score: 6.9
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://groupsession.jp/info/info-news/security20251208
N/A
https://jvn.jp/en/jp/JVN19940619/
N/A
Hyperlink: https://groupsession.jp/info/info-news/security20251208
Resource: N/A
Hyperlink: https://jvn.jp/en/jp/JVN19940619/
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:vultures@jpcert.or.jp
Published At:12 Dec, 2025 | 05:16
Updated At:17 Feb, 2026 | 15:31

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.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.06.9MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Secondary3.05.3MEDIUM
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Type: Secondary
Version: 4.0
Base score: 6.9
Base severity: MEDIUM
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Type: Secondary
Version: 3.0
Base score: 5.3
Base severity: MEDIUM
Vector:
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CPE Matches
groupsession
groupsession
>>groupsession>>Versions before 5.3.0(exclusive)
cpe:2.3:a:groupsession:groupsession:*:*:*:*:free:*:*:*
groupsession
groupsession
>>groupsession>>Versions before 5.3.2(exclusive)
cpe:2.3:a:groupsession:groupsession:*:*:*:*:zion:*:*:*
groupsession
groupsession
>>groupsession>>Versions before 5.3.3(exclusive)
cpe:2.3:a:groupsession:groupsession:*:*:*:*:bycloud:*:*:*
Weaknesses
CWE IDTypeSource
CWE-1385Primaryvultures@jpcert.or.jp
CWE ID: CWE-1385
Type: Primary
Source: vultures@jpcert.or.jp
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://groupsession.jp/info/info-news/security20251208vultures@jpcert.or.jp
Vendor Advisory
https://jvn.jp/en/jp/JVN19940619/vultures@jpcert.or.jp
Third Party Advisory
Hyperlink: https://groupsession.jp/info/info-news/security20251208
Source: vultures@jpcert.or.jp
Resource:
Vendor Advisory
Hyperlink: https://jvn.jp/en/jp/JVN19940619/
Source: vultures@jpcert.or.jp
Resource:
Third Party Advisory

Change History

0
Information is not available yet

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