Grav: Privilege Escalation via Missing Server-Side Validation of groups/access

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Summary

CVECVE-2026-42613
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-11 16:17:34 UTC
Updated2026-05-12 14:51:21 UTC
DescriptionGrav 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.

Risk And Classification

Primary CVSS: v3.1 9.4 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Problem Types: CWE-20 | CWE-862 | CWE-20 CWE-20: Improper Input Validation | CWE-862 CWE-862: Missing Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary9.4CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
3.1CNADECLARED9.4CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
Low

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Getgrav Grav affected < 2.0.0-beta.2 Not specified

References

ReferenceSourceLinkTags
github.com/getgrav/grav/security/advisories/GHSA-w48r-jppp-rcfw 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/getgrav/grav-plugin-login/commit/3d419a0dabd70aed1fd49afcd591... [email protected] github.com
github.com/getgrav/grav/security/advisories/GHSA-pxm6-mhxr-q4mj [email protected] github.com
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