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CVE-2021-47812— GravCMS 1.10.7 - Arbitrary YAML Write/Update (Unauthenticated) (2)

Quick assessment

Affected
Getgrav GravCMS
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.

GravCMS是Grav公司的一个内容管理系统。 GravCMS 1.10.7版本存在安全漏洞，该漏洞源于未经验证写入任意YAML配置，可能导致通过调度程序端点执行PHP代码。

CVSS 9.8 · Critical EPSS 2.24% · P82

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2021-47812

Vulnerability Information
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Vulnerability Title
GravCMS 1.10.7 - Arbitrary YAML Write/Update (Unauthenticated) (2)
Source: CVE Program / CVE List V5
Vulnerability Description
GravCMS 1.10.7 contains an unauthenticated vulnerability that allows remote attackers to write arbitrary YAML configuration and execute PHP code through the scheduler endpoint. Attackers can exploit the admin-nonce parameter to inject base64-encoded payloads and create malicious custom jobs with system command execution.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
GravCMS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
GravCMS是Grav公司的一个内容管理系统。 GravCMS 1.10.7版本存在安全漏洞，该漏洞源于未经验证写入任意YAML配置，可能导致通过调度程序端点执行PHP代码。
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)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Getgrav GravCMS 1.10.7 -

II. Public POCs for CVE-2021-47812

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III. Intelligence Information for CVE-2021-47812

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Exploits & Public PoCs for CVE-2021-47812 (1)

IV. Related Vulnerabilities

Same vendor: Getgrav
Same weakness: CWE-862

V. Comments for CVE-2021-47812

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