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CVE-2026-42607— Grav: Remote Code Execution (RCE) via Malicious Plugin ZIP Upload in Direct Install Feature

CVSS 9.1 · Critical EPSS 0.31% · P54

Affected Version Matrix 1

VendorProductVersion RangeStatus
getgravgrav< 2.0.0-beta.2affected
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I. Basic Information for CVE-2026-42607

Vulnerability Information
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Vulnerability Title
Grav: Remote Code Execution (RCE) via Malicious Plugin ZIP Upload in Direct Install Feature
Source: NVD (National Vulnerability Database)
Vulnerability Description
Grav is a file-based Web platform. Prior to 2.0.0-beta.2, an authenticated user with administrative privileges can achieve Remote Code Execution (RCE) by uploading a specially crafted ZIP file through the "Direct Install" tool. While the system attempts to block direct .php file uploads, it fails to inspect the contents of uploaded ZIP archives. Once a malicious plugin is extracted, it can execute arbitrary PHP code or drop a persistent web shell on the server. This vulnerability is fixed in 2.0.0-beta.2.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/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Grav开源的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 2.0.0-beta.2之前版本存在代码注入漏洞，该漏洞源于通过Direct Install工具上传特制ZIP文件时未检查ZIP存档内容，可能导致具有管理员权限的认证用户实现远程代码执行。
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 < 2.0.0-beta.2 -

II. Public POCs for CVE-2026-42607

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III. Intelligence Information for CVE-2026-42607

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Same Patch Batch · getgrav · 2026-05-11 · 13 CVEs total

CVE-2026-426139.4 CRITICALGrav: Privilege Escalation via Missing Server-Side Validation of groups/access
CVE-2026-426118.9 HIGHGrav: Stored XSS via Tag Injection
CVE-2026-428438.8 HIGHgrav-plugin-api: Grav API Privilege Escalation to Super Admin
CVE-2026-426128.5 HIGHGrav: Publisher-Level Stored XSS via Unquoted Event Attributes
CVE-2026-426098.1 HIGHGrav: Administrative Account Disruption and Privilege De-escalation via User Overwrite Log
CVE-2026-447387.7 HIGHGrav: Twig sandbox allows editor-role users to exfiltrate all plugin secrets via Config::t
CVE-2026-426106.5 MEDIUMGrav: Sensitive Information Disclosure via Accounts Service Bypass
CVE-2026-428425.4 MEDIUMgrav-plugin-form: XSS via Taxonomy Field Values in Admin Panel
CVE-2026-42608Grav: Unauthenticated Path Traversal & Arbitrary File Write in FormFlash component.
CVE-2026-42845Grav: Anonymous Page Content Overwrite via Form File Upload filename Override
CVE-2026-42841Grav: Stored XSS via Markdown media attribute() action in Grav CMS
CVE-2026-44737grav-plugin-admin: Stored Cross-Site Scripting (XSS) Reflected endpoint /admin/pages/[page

IV. Related Vulnerabilities

Same product: grav
Same vendor: getgrav
Same weakness: CWE-94

V. Comments for CVE-2026-42607

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