Vulnerability Report

CVE-2026-42613

Title: Unauthenticated Privilege Escalation in Grav Login Plugin

Privilege Escalation

Proof Of Concept

PoC Available for CVE-2026-42613

CWE Category CWE-20

Published Date May 11, 2026

Modified Date May 12, 2026

Exploit Status Available

Score 9.4 CVSS v3.1

Exploit Probability (EPSS)

0.56%

Vulnerability Summary

CVE-2026-42613: 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.

Impacted Vendors

Analysis in Progress...

Reference Links

https://github.com/getgrav/grav-plugin-login/commit/3d419a0dabd70aed1fd49afcd5919004a4141da1 https://github.com/getgrav/grav/security/advisories/GHSA-pxm6-mhxr-q4mj

CVSS v3.1

Source Entity [email protected]

Severity CRITICAL

9.4

Attack Vector

NETWORK

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

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

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2026-42613 Exploits & PoCs (Proof Of Concept)

GitHub https://github.com/ivanesk315/CVE-2026-42613

View Code

May 12, 2026 MODIFIED

Vulnerability data updated via NVD.

May 11, 2026 MODIFIED

Vulnerability data updated via NVD.

Attack Vector Matrix

Access Vector NETWORK

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


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

Affected Stack

No specific products linked.