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CVE-2024-56136— /api/v1/jwt/fetch_api_key endpoint can leak if an email address has an account in Zulip server

Quick assessment

Affected
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 server是美国Zulip公司的一款开源的团队聊天应用程序。 Zulip server 7.0版本至9.4之前版本存在信息泄露漏洞，该漏洞源于容易受到信息泄露攻击，未经身份验证的用户可以发出请求并确定用户是否正在使用电子邮件地址。

AI Predicted 5.3 Difficulty: Easy EPSS 0.57% · P46
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I. Basic Information for CVE-2024-56136

Vulnerability Information
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Vulnerability Title
/api/v1/jwt/fetch_api_key endpoint can leak if an email address has an account in Zulip server
Source: CVE Program / CVE List V5
Vulnerability Description
Zulip server provides an open-source team chat that helps teams stay productive and focused. Zulip Server 7.0 and above are vulnerable to an information disclose attack, where, if a Zulip server is hosting multiple organizations, an unauthenticated user can make a request and determine if an email address is in use by a user. Zulip Server 9.4 resolves the issue, as does the `main` branch of Zulip Server. Users are advised to upgrade. There are no known workarounds for this issue.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Zulip server 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Zulip server是美国Zulip公司的一款开源的团队聊天应用程序。 Zulip server 7.0版本至9.4之前版本存在信息泄露漏洞，该漏洞源于容易受到信息泄露攻击，未经身份验证的用户可以发出请求并确定用户是否正在使用电子邮件地址。
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 >= 7.0, < 9.4 -

II. Public POCs for CVE-2024-56136

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III. Intelligence Information for CVE-2024-56136

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Patches & Fixes for CVE-2024-56136 (1)

Vendor Advisories for CVE-2024-56136 (1)

IV. Related Vulnerabilities

Same product: zulip
Same vendor: zulip
Same weakness: CWE-200

V. Comments for CVE-2024-56136

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