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CVE-2026-42613— Grav: Privilege Escalation via Missing Server-Side Validation of groups/access

Quick assessment

Affected
getgrav grav
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.

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之前版本存在输入验证错误漏洞，该漏洞源于Login插件中Login::register方法未对注册POST数据中的groups和access字段进行服务端验证，可能导致未认证用户通过注入这些字段自注册为admin.super权限。

CVSS 9.4 · Critical EPSS 0.56% · P45

Possible ATT&CK Techniques 1 AI

T1136 · Create Account

Affected Version Matrix 1

VendorProduct Version RangeStatus
getgrav grav < 2.0.0-beta.2 affected
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I. Basic Information for CVE-2026-42613

Vulnerability Information
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Vulnerability Title
Grav: Privilege Escalation via Missing Server-Side Validation of groups/access
Source: CVE Program / CVE List V5
Vulnerability Description
Grav is a file-based Web platform. Prior to 2.0.0-beta.2, the Login::register() method in the Login plugin accepts attacker-controlled groups and access fields from the registration POST data without server-side validation. When registration is enabled and groups or access are included in the configured allowed fields list, an unauthenticated user can self-register with admin.super privileges by injecting these fields into the registration request. This vulnerability is fixed in 2.0.0-beta.2.
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:L
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Grav 输入验证错误漏洞
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之前版本存在输入验证错误漏洞，该漏洞源于Login插件中Login::register方法未对注册POST数据中的groups和access字段进行服务端验证，可能导致未认证用户通过注入这些字段自注册为admin.super权限。
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 < 2.0.0-beta.2 -

II. Public POCs for CVE-2026-42613

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III. Intelligence Information for CVE-2026-42613

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Patches & Fixes for CVE-2026-42613 (1)

Vendor Advisories for CVE-2026-42613 (1)

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

CVE-2026-42607 9.1 CRITICAL Grav: Remote Code Execution (RCE) via Malicious Plugin ZIP Upload in Direct Install Featur
CVE-2026-42611 8.9 HIGH Grav: Stored XSS via Tag Injection
CVE-2026-42843 8.8 HIGH grav-plugin-api: Grav API Privilege Escalation to Super Admin
CVE-2026-42612 8.5 HIGH Grav: Publisher-Level Stored XSS via Unquoted Event Attributes
CVE-2026-42609 8.1 HIGH Grav: Administrative Account Disruption and Privilege De-escalation via User Overwrite Log
CVE-2026-44738 7.7 HIGH Grav: Twig sandbox allows editor-role users to exfiltrate all plugin secrets via Config::t
CVE-2026-42610 6.5 MEDIUM Grav: Sensitive Information Disclosure via Accounts Service Bypass
CVE-2026-42842 5.4 MEDIUM grav-plugin-form: XSS via Taxonomy Field Values in Admin Panel
CVE-2026-42608 Grav: Unauthenticated Path Traversal & Arbitrary File Write in FormFlash component.
CVE-2026-42845 Grav: Anonymous Page Content Overwrite via Form File Upload filename Override
CVE-2026-42841 Grav: Stored XSS via Markdown media attribute() action in Grav CMS
CVE-2026-44737 grav-plugin-admin: Stored Cross-Site Scripting (XSS) Reflected endpoint /admin/pages/[page

IV. Related Vulnerabilities

Same product: grav
Same vendor: getgrav
Same weakness: CWE-20

V. Comments for CVE-2026-42613

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