CVE-2026-42613— Grav: Privilege Escalation via Missing Server-Side Validation of groups/access
Possible ATT&CK Techniques 1AI
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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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
输入验证不恰当
Source: NVD (National Vulnerability Database)
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
II. Public POCs for CVE-2026-42613
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- https://github.com/getgrav/grav/security/advisories/GHSA-pxm6-mhxr-q4mjx_refsource_CONFIRM
- https://nvd.nist.gov/vuln/detail/CVE-2026-42613
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
- CVE-2026-42844
Grav: Low-privileged API users can create super-admin accoun - CVE-2026-44738
Grav: Twig sandbox allows editor-role users to exfiltrate al - CVE-2026-42842
grav-plugin-form: XSS via Taxonomy Field Values in Admin Pan - CVE-2026-42612
Grav: Publisher-Level Stored XSS via Unquoted Event Attribut - CVE-2026-42611
Grav: Stored XSS via Tag Injection
Same vendor: getgrav
- CVE-2026-42844
Grav: Low-privileged API users can create super-admin accoun - CVE-2026-42843
grav-plugin-api: Grav API Privilege Escalation to Super Admi - CVE-2026-44737
grav-plugin-admin: Stored Cross-Site Scripting (XSS) Reflect - CVE-2026-44738
Grav: Twig sandbox allows editor-role users to exfiltrate al - CVE-2026-42845
Grav: Anonymous Page Content Overwrite via Form File Upload
V. Comments for CVE-2026-42613
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