---
id: GHSA-rvmm-v933-jgxq
title: >-
  Craft CMS: Missing authorization check allows non-admin control panel users
  access to user registration metrics
summary: >-
  Craft CMS: Missing authorization check allows non-admin control panel users
  access to user registration metrics
severity: medium
cwe:
  - CWE-862
vendor: craftcms
product: craftcms/cms
ecosystem: composer
affected:
  - 'craftcms/cms >= 4.0.0-RC1, < 4.18.1'
  - 'craftcms/cms >= 5.0.0-RC1, < 5.10.3'
patched:
  - craftcms/cms 4.18.1
  - craftcms/cms 5.10.3
published: '2026-08-06'
updated: '2026-08-06'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-rvmm-v933-jgxq'
references:
  - url: 'https://github.com/craftcms/cms/security/advisories/GHSA-rvmm-v933-jgxq'
  - url: >-
      https://github.com/craftcms/cms/commit/9ee53efc1314e6aba32771c66a13e072a246f4ce
  - url: 'https://github.com/craftcms/cms/releases/tag/4.18.1'
  - url: 'https://github.com/craftcms/cms/releases/tag/5.10.3'
  - url: 'https://github.com/advisories/GHSA-rvmm-v933-jgxq'
tags:
  - ghsa
  - composer
ingestedAt: '2026-08-06T22:05:23.089Z'
---

## Overview

`ChartsController::actionGetNewUsersData()` at `/actions/charts/get-new-users-data` is missing a `requirePermission('viewUsers')` authorization check. Any authenticated control panel user, regardless of permissions beyond `accessCp`, can POST to this endpoint to receive time-series user registration counts for the entire site or for an arbitrary user group ID.

The `viewUsers` permission is consistently required throughout the control panel before exposing user-related data, but this action enforces only the base `accessCp` check inherited from the framework.

Each call returns the total count of users who joined the specified group in the requested period.

## Impact

Any control panel user with only `accessCp` permission can obtain the total number of registered users and their registration date distribution across any time window.

In installations with multiple editor roles, this allows a low-privilege control panel user to infer user group sizes and registration trends that would normally require the `viewUsers` permission to access.

No user PII (name, email, password) is disclosed; only aggregate counts and timestamps are returned. Confidentiality impact is low. No integrity or availability impact.

## Affected packages

- `craftcms/cms >= 4.0.0-RC1, < 4.18.1`
- `craftcms/cms >= 5.0.0-RC1, < 5.10.3`

## Remediation

Upgrade to a patched release:

- `craftcms/cms 4.18.1`
- `craftcms/cms 5.10.3`