CVE-2026-42613CWE-20CWE-862

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

Critical · published May 11, 2026

CVSS v3.1
9.4
EPSS
1%
Percentile
45.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.4 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CVSS v4.0
Not supplied
EPSS
0.00558 · 45.7th percentile
Weaknesses
CWE-20 · Improper Input Validation; CWE-862 · Missing Authorization
Published
2026-05-11T15:24Z
EPSS history
Timeline
  • 11 MAY 15:24Z
    Grav: Privilege Escalation via Missing Server-Side Validation of groups/access
    cvelistv5