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CVE-2021-20875

MEDIUM
6.1
CVSS Score
Published: December 24, 2021 at 06:30 AM UTC
Updated: June 17, 2026 at 03:34 AM UTC
2 products affected across 2 vendorsGroupsessionGroupSession

Using GroupSession Free edition, GroupSession byCloud, GroupSession ZION by Japan Total System Co.,Ltd.?

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Severity
MEDIUM6.1
Exploit prediction
EPSS 0.8%

Description

Open redirect vulnerability in GroupSession Free edition ver5.1.1 and earlier, GroupSession byCloud ver5.1.1 and earlier, and GroupSession ZION ver5.1.1 and earlier allows a remote unauthenticated attacker to redirect users to arbitrary web sites and conduct phishing attacks by having a user to access a specially crafted URL.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_refsource_MISCVendor Advisory
Source: [email protected]
https://groupsession.jp/info/info-news/security20211220
x_refsource_MISCThird Party Advisory
Source: [email protected]
https://jvn.jp/en/jp/JVN79798166/index.html

CVSS

6.1MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-601

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