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CVE-2021-3967— Improper Access Control in zulip/zulip

Quick assessment

Affected
zulip zulip/zulip
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.

Zulip是Zulip团队的一款功能强大的开源群聊应用程序。用于将实时聊天的即时性与线程对话的生产力优势相结合。 Zulip 存在安全漏洞，该漏洞源于GitHub库中存在不正确的访问控制。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.84% · P55

Possible ATT&CK Techniques 1 AI

T1078 · Valid Accounts
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I. Basic Information for CVE-2021-3967

Vulnerability Information
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Vulnerability Title
Improper Access Control in zulip/zulip
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Access Control in GitHub repository zulip/zulip prior to 4.10.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Zulip 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zulip是Zulip团队的一款功能强大的开源群聊应用程序。用于将实时聊天的即时性与线程对话的生产力优势相结合。 Zulip 存在安全漏洞，该漏洞源于GitHub库中存在不正确的访问控制。
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
zulip zulip/zulip unspecified ~ 4.10 -

II. Public POCs for CVE-2021-3967

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III. Intelligence Information for CVE-2021-3967

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Patches & Fixes for CVE-2021-3967 (1)

Vendor Advisories for CVE-2021-3967 (1)

IV. Related Vulnerabilities

Same product: zulip/zulip
Same vendor: zulip
Same weakness: CWE-284

V. Comments for CVE-2021-3967

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