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CVE-2021-20874

Quick assessment

Affected
Japan Total System Co.,Ltd. GroupSession Free edition, GroupSession byCloud, GroupSession ZION
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Japan Total System GroupSession是日本Japan Total System公司的一个群件项目，以方便企业和组织的沟通，旨在促进信息共享。 GroupSession 存在安全漏洞，攻击者可利用该漏洞访问服务器上的任意文件。

AI Predicted 7.5 Difficulty: Moderate EPSS 1.30% · P69

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery
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I. Basic Information for CVE-2021-20874

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Incorrect permission assignment for critical resource 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 access arbitrary files on the server and obtain sensitive information via unspecified vectors.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Japan Total System GroupSession 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Japan Total System GroupSession是日本Japan Total System公司的一个群件项目，以方便企业和组织的沟通，旨在促进信息共享。 GroupSession 存在安全漏洞，攻击者可利用该漏洞访问服务器上的任意文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Japan Total System Co.,Ltd. GroupSession Free edition, GroupSession byCloud, GroupSession ZION GroupSession Free edition ver5.1.1 and earlier, GroupSession byCloud ver5.1.1 and earlier, and GroupSession ZION ver5.1.1 and earlier -

II. Public POCs for CVE-2021-20874

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2021-20874

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Vendor Advisories for CVE-2021-20874 (1)

Other References for CVE-2021-20874 (1)

Same Patch Batch · Japan Total System Co.,Ltd. · 2021-12-24 · 3 CVEs total

CVE-2021-20876 Japan Total System GroupSession 路径遍历漏洞
CVE-2021-20875 Japan Total System GroupSession 输入验证错误漏洞

IV. Related Vulnerabilities

Same product: GroupSession Free edition, GroupSession byCloud, GroupSession ZION
Same vendor: Japan Total System Co.,Ltd.

V. Comments for CVE-2021-20874

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