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Medium, CVSS 5.3amended

Craft CMS: Missing authorization check allows non-admin control panel users access to user registration metrics

CVE-2026-14794GHSA-rvmm-v933-jgxq

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (craftcms/cms 5.10.3, 4.18.1), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • Packagist craftcms/cms

    Affected
    >= 4.0.0-RC1, < 4.18.1>= 5.0.0-RC1, < 5.10.3
    Fixed in
    4.18.1, 5.10.3

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
5.3 · CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N · score source
EPSS
  • CVE-2026-14794: 0.39% estimated exploitation activity in the next 30 days; percentile 32.66 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

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…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 3 · amended ·

    Amended from ghsa record GHSA-rvmm-v933-jgxq

  2. Revision 2 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 1 · created ·

    Published from osv record GHSA-rvmm-v933-jgxq

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-14794

Advisory: Craft CMS: Missing authorization check allows non-admin control panel users access to user registration metrics
IDs: CVE-2026-14794, GHSA-rvmm-v933-jgxq
Record: https://patchnext.com/advisories/cve-2026-14794 (revision 3, source checked 26 Oct 2026, 14:50 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 5.3)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: craftcms/cms 5.10.3, 4.18.1. A vendor fix does not mean a deployment is fixed.

## Affected components
- Packagist craftcms/cms: affected >= 4.0.0-RC1, < 4.18.1; >= 5.0.0-RC1, < 5.10.3; fixed in 4.18.1, 5.10.3

## Suggested inspection (read-only)
- Packagist craftcms/cms: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on craftcms/cms.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-rvmm-v933-jgxq (OSV record GHSA-rvmm-v933-jgxq lists affected ranges: Packagist craftcms/cms >=4.0.0-RC1 =5.0.0-RC1 <5.10.3 (fixed))
- Verified: https://github.com/advisories/GHSA-rvmm-v933-jgxq (GitHub-reviewed advisory GHSA-rvmm-v933-jgxq lists affected ranges: Packagist craftcms/cms >=4.0.0-RC1 =5.0.0-RC1 <5.10.3)

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