Craft CMS: Missing authorization check allows non-admin control panel users access to user registration metrics
A missing authorization check in Craft CMS allows any authenticated control panel user with only the base access permission to retrieve aggregate user registration metrics. The endpoint /actions/charts/get-new-users-data does not enforce the expected 'viewUsers' permission, exposing time-series counts of new user registrations by group and date. No personally identifiable information is disclosed, and the impact is limited to revealing user group sizes and registration trends.
AI Analysis
Technical Summary
The vulnerability exists in the ChartsController::actionGetNewUsersData() method of Craft CMS, where the required 'viewUsers' permission check is missing. Instead, only the base 'accessCp' permission is enforced, allowing any authenticated control panel user to POST to this endpoint and receive aggregate user registration counts over arbitrary time windows and for any user group ID. This breaks the intended access control model, which normally restricts user-related data to users with 'viewUsers' permission. The data returned includes total counts and timestamps but no user PII. The vulnerability is classified as CWE-862 (Missing Authorization).
Potential Impact
Low confidentiality impact as only aggregate user registration counts and timestamps are disclosed, with no personal user data exposed. No impact on integrity or availability. However, low-privilege control panel users can infer user group sizes and registration trends that should be restricted, potentially aiding in reconnaissance or privilege escalation planning.
Mitigation Recommendations
A patch is available to enforce the correct 'viewUsers' permission check on the affected endpoint. Users should apply the official fix from the vendor to restrict access appropriately. Until patched, restrict control panel user permissions to trusted users only. No other mitigation is indicated by the vendor advisory.
Craft CMS: Missing authorization check allows non-admin control panel users access to user registration metrics
Description
A missing authorization check in Craft CMS allows any authenticated control panel user with only the base access permission to retrieve aggregate user registration metrics. The endpoint /actions/charts/get-new-users-data does not enforce the expected 'viewUsers' permission, exposing time-series counts of new user registrations by group and date. No personally identifiable information is disclosed, and the impact is limited to revealing user group sizes and registration trends.
CVSS v4.0
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability exists in the ChartsController::actionGetNewUsersData() method of Craft CMS, where the required 'viewUsers' permission check is missing. Instead, only the base 'accessCp' permission is enforced, allowing any authenticated control panel user to POST to this endpoint and receive aggregate user registration counts over arbitrary time windows and for any user group ID. This breaks the intended access control model, which normally restricts user-related data to users with 'viewUsers' permission. The data returned includes total counts and timestamps but no user PII. The vulnerability is classified as CWE-862 (Missing Authorization).
Potential Impact
Low confidentiality impact as only aggregate user registration counts and timestamps are disclosed, with no personal user data exposed. No impact on integrity or availability. However, low-privilege control panel users can infer user group sizes and registration trends that should be restricted, potentially aiding in reconnaissance or privilege escalation planning.
Mitigation Recommendations
A patch is available to enforce the correct 'viewUsers' permission check on the affected endpoint. Users should apply the official fix from the vendor to restrict access appropriately. Until patched, restrict control panel user permissions to trusted users only. No other mitigation is indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-rvmm-v933-jgxq
- Osv Schema Version
- 1.4.0
- Aliases
- []
- Ecosystems
- ["Packagist"]
- Database Specific Severity
- MODERATE
- Cvss Version
- 4.0
Threat ID: 6a7573b9bf8831d539d940c9
Added to database: 08/07/2026, 05:57:13 UTC
Last enriched: 08/07/2026, 07:01:36 UTC
Last updated: 08/07/2026, 07:01:36 UTC
Views: 2
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