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I. Basic Information for CVE-2021-29440
Vulnerability Information

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Vulnerability Title
Twig allowing dangerous PHP functions by default
Source: NVD (National Vulnerability Database)
Vulnerability Description
Grav is a file based Web-platform. Twig processing of static pages can be enabled in the front matter by any administrative user allowed to create or edit pages. As the Twig processor runs unsandboxed, this behavior can be used to gain arbitrary code execution and elevate privileges on the instance. The issue was addressed in version 1.7.11.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: NVD (National Vulnerability Database)
Vulnerability Title
Grav 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Grav是一套可扩展的用于个人博客、小型内容发布平台和单页产品展示的CMS(内容管理系统)。 Grav 存在代码注入漏洞,攻击者可利用该漏洞任意代码执行和提升实例上的特权。
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
VendorProductAffected VersionsCPESubscribe
getgravgrav < 1.7.11 -
II. Public POCs for CVE-2021-29440
#POC DescriptionSource LinkShenlong Link
1Unsafe Twig processing of static pages leading to RCE in Grav CMS 1.7.10https://github.com/CsEnox/CVE-2021-29440POC Details
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III. Intelligence Information for CVE-2021-29440
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IV. Related Vulnerabilities
V. Comments for CVE-2021-29440

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