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CVE-2024-27921— Grav File Upload Path Traversal vulnerability

Quick assessment

Affected
getgrav grav
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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 1.7.45 版本之前存在安全漏洞，该漏洞源于应用程序存在文件上传和路径遍历漏洞。

CVSS 8.8 · High EPSS 60.59% · P99
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I. Basic Information for CVE-2024-27921

Vulnerability Information
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Vulnerability Title
Grav File Upload Path Traversal vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
Grav is an open-source, flat-file content management system. A file upload path traversal vulnerability has been identified in the application prior to version 1.7.45, enabling attackers to replace or create files with extensions like .json, .zip, .css, .gif, etc. This critical security flaw poses severe risks, that can allow attackers to inject arbitrary code on the server, undermine integrity of backup files by overwriting existing files or creating new ones, and exfiltrate sensitive data using CSS exfiltration techniques. Upgrading to patched version 1.7.45 can mitigate the issue.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Grav 安全漏洞
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 1.7.45 版本之前存在安全漏洞，该漏洞源于应用程序存在文件上传和路径遍历漏洞。
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
getgrav grav < 1.7.45 -

II. Public POCs for CVE-2024-27921

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7954 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2024-27921

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Patches & Fixes for CVE-2024-27921 (1)

Vendor Advisories for CVE-2024-27921 (1)

Same Patch Batch · getgrav · 2024-03-21 · 5 CVEs total

CVE-2024-28119 8.8 HIGH Grav vulnerable to Server Side Template Injection (SSTI) via Twig escape handler
CVE-2024-28118 8.8 HIGH Grav vulnerable to Server Side Template Injection (SSTI)
CVE-2024-28117 8.8 HIGH Grav vulnerable to Server Side Template Injection (SSTI)
CVE-2024-28116 8.8 HIGH Server-Side Template Injection (SSTI) with Grav CMS security sandbox bypass

IV. Related Vulnerabilities

Same product: grav
Same vendor: getgrav
Same weakness: CWE-22

V. Comments for CVE-2024-27921

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