What’s Vulnerable › Vulnerabilities

CVE-2021-20876

• Severity: medium (CVSS 6.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-12-24 · updated 2026-06-17
• Weakness: CWE-22

Description

Path traversal 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 an attacker with an administrative privilege to obtain sensitive information stored in the hierarchy above the directory on the published site's server via unspecified vectors.

Affected products

• Japan Total System Co.,Ltd. GroupSession: through 5.1.1

References

• https://groupsession.jp/info/info-news/security20211220
• https://jvn.jp/en/jp/JVN79798166/index.html
• https://groupsession.jp/info/info-news/security20211220
• https://jvn.jp/en/jp/JVN79798166/index.html

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