Summary
Craft CMS: Missing authorization check allows non-admin control panel users access to user registration metrics
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.
The application does not perform an authorization check before performing a sensitive operation. Typical impact: unauthorized access to restricted functionality or data.
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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craftcms/cms to 4.18.1 or later; craftcms/cms to 5.10.3 or later
Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
Frequently Asked Questions
- What is GHSA-RVMM-V933-JGXQ? GHSA-RVMM-V933-JGXQ is a medium-severity missing authorization vulnerability in craftcms/cms (composer), affecting versions >= 4.0.0-RC1, < 4.18.1. It is fixed in 4.18.1, 5.10.3. The application does not perform an authorization check before performing a sensitive operation.
- Which versions of craftcms/cms are affected by GHSA-RVMM-V933-JGXQ? craftcms/cms (composer) versions >= 4.0.0-RC1, < 4.18.1 is affected.
- Is there a fix for GHSA-RVMM-V933-JGXQ? Yes. GHSA-RVMM-V933-JGXQ is fixed in 4.18.1, 5.10.3. Upgrade to this version or later.
- Is GHSA-RVMM-V933-JGXQ exploitable, and should I be worried? Whether GHSA-RVMM-V933-JGXQ is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether GHSA-RVMM-V933-JGXQ is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
- How do I fix GHSA-RVMM-V933-JGXQ?
- Upgrade
craftcms/cmsto 4.18.1 or later - Upgrade
craftcms/cmsto 5.10.3 or later
- Upgrade