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CVE-2021-39192— Privilege escalation: all users can access Admin-level API keys

Quick assessment

Affected
TryGhost Ghost
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.

Ghost CMS是新加坡Ghost基金会的一套使用JavaScript编写的开源无头内容管理系统（CMS）。 Ghost 4.0.0 至 4.9.4版本存在信息泄露漏洞，该漏洞源于limits服务实现中出现错误，允许所有经过身份验证的用户（包括参与者）通过integrations API端点查看管理级API密钥，从而导致权限提升。此问题在Ghost版本4.10.0中进行了修补。如无法升级，请禁用所有非管理员帐户以阻止API访问。并强烈建议在修补或应用解决方案后重新生成所有API密钥

CVSS 6.5 · Medium EPSS 1.02% · P62

Possible ATT&CK Techniques 1 AI

T1098.004 · SSH Authorized Keys
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I. Basic Information for CVE-2021-39192

Vulnerability Information
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Vulnerability Title
Privilege escalation: all users can access Admin-level API keys
Source: CVE Program / CVE List V5
Vulnerability Description
Ghost is a Node.js content management system. An error in the implementation of the limits service between versions 4.0.0 and 4.9.4 allows all authenticated users (including contributors) to view admin-level API keys via the integrations API endpoint, leading to a privilege escalation vulnerability. This issue is patched in Ghost version 4.10.0. As a workaround, disable all non-Administrator accounts to prevent API access. It is highly recommended to regenerate all API keys after patching or applying the workaround.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Ghost CMS 信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Ghost CMS是新加坡Ghost基金会的一套使用JavaScript编写的开源无头内容管理系统（CMS）。 Ghost 4.0.0 至 4.9.4版本存在信息泄露漏洞，该漏洞源于limits服务实现中出现错误，允许所有经过身份验证的用户（包括参与者）通过integrations API端点查看管理级API密钥，从而导致权限提升。此问题在Ghost版本4.10.0中进行了修补。如无法升级，请禁用所有非管理员帐户以阻止API访问。并强烈建议在修补或应用解决方案后重新生成所有API密钥
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
TryGhost Ghost >= 4.0.0, < 4.10.0 -

II. Public POCs for CVE-2021-39192

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III. Intelligence Information for CVE-2021-39192

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Vendor Advisories for CVE-2021-39192 (1)

Other References for CVE-2021-39192 (1)

IV. Related Vulnerabilities

Same product: Ghost
Same vendor: TryGhost
Same weakness: CWE-200

V. Comments for CVE-2021-39192

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