# CVE-2026-126061: Winter CMS: My Account preview exposes another backend user's profile by record ID

Status: published. Published: 2026-11-10. Updated: 2026-11-14.

Winter CMS is a content management system built on the Laravel PHP framework. From 1.2.13 until 1.2.14, the Backend\Controllers\MyAccount controller inherits the FormController actions create, update, and preview while declaring an empty $requiredPermissions array, and formFindModelObject() resolves a caller-supplied record identifier through an unscoped Backend\Models\User query. Any authenticated backend user can request another sequential user identifier through /backend/backend/myaccount/preview/{other_user_id} or the inherited update action and read profile data including name, login, email, avatar, role, group membership, superuser status, and throttle state. Password material is not exposed, and existing model authorization guards block cross-user writes. This issue is fixed in version 1.2.14.

## Remediation

- fix: winter/wn-backend-module (composer): GitHub reports patched versions >= 1.2.14. Check the advisory for the affected release branch. (source: GitHub GHSA-mpmw-f6h6-3g26) — https://github.com/wintercms/winter/security/advisories/GHSA-mpmw-f6h6-3g26
- fix: winter/wn-backend-module (Packagist): OSV reports a fixed version 1.2.14. Check the advisory for supported release branches. (source: OSV GHSA-mpmw-f6h6-3g26) — https://github.com/advisories/GHSA-mpmw-f6h6-3g26

## Affected products and versions

- wintercms / winter: >= 1.2.13, < 1.2.14 (affected). Source: CNA: GitHub_M
-  / winter/wn-backend-module (winter/wn-backend-module): 1.2.13 (affected, GitHub advisory range). Source: GitHub GHSA-mpmw-f6h6-3g26
-  / winter/wn-backend-module (winter/wn-backend-module): 1.2.13 (affected, Packagist); v1.2.13 (affected, Packagist); Ecosystem version events: introduced 1.2.13; fixed 1.2.14. Source: OSV GHSA-mpmw-f6h6-3g26

## Severity and prioritization

- CVSS 3.1: 4.3 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N; source: CNA: GitHub_M

- CVSS 3.1: 4.3 (medium); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N; source: NVD: security-advisories@github.com

- CISA KEV: No listing in collected sources

- EPSS: 0.25% as of 2026-11-13; percentile 17.00%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-639

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://github.com/wintercms/winter/security/advisories/GHSA-mpmw-f6h6-3g26 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/wintercms/winter/commit/cdbc8f5a23db27f72ccec658a8e5769e6d9f6dcb (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/wintercms/winter/releases/tag/v1.2.14 (CNA: GitHub_M; x_refsource_MISC)

- https://github.com/wintercms/winter/commit/cdbc8f5a23db27f72ccec658a8e5769e6d9f6dcb (security-advisories@github.com)

- https://github.com/wintercms/winter/releases/tag/v1.2.14 (security-advisories@github.com)

- https://github.com/wintercms/winter/security/advisories/GHSA-mpmw-f6h6-3g26 (security-advisories@github.com)

- https://github.com/wintercms/winter/security/advisories/GHSA-mpmw-f6h6-3g26 (GitHub Security Advisories; advisory)

- https://github.com/advisories/GHSA-mpmw-f6h6-3g26 (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-mpmw-f6h6-3g26 (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-126061; retrieved 2026-11-14; source updated 2026-11-14

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-126061; retrieved 2026-11-13; source updated 2026-11-12

- GitHub Security Advisories: https://github.com/wintercms/winter/security/advisories/GHSA-mpmw-f6h6-3g26; retrieved 2026-11-13; source updated 2026-11-10

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-mpmw-f6h6-3g26; retrieved 2026-11-10; source updated 2026-11-10

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-126061; retrieved 2026-11-14; source updated Not reported

Revision: 24ab06041f3526c4aa0585ccf48985ec3f8fa11d7a24e607575c94aeec1c37c2

Canonical: https://y2.dev/cve/CVE-2026-126061

## Agent and API access

Public CVE pages, Markdown, and JSON are free to read without an account or API key.

- Public catalog: https://y2.dev/cve/index.json. Follow nextCursor with the same search, filters, sort, and limit (1–100). A null cursor marks the end.

- WebMCP: search_cve_disclosures, get_cve_disclosure, get_cve_page_markdown, get_y2_cve_access. Available in compatible browsers.

- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

- x402: Pay per request without an account or API key. Omit Authorization, read the HTTP 402 PAYMENT-REQUIRED challenge, validate its current requirements, and retry with PAYMENT-SIGNATURE through an authorized payment client. These browser tools never make payments. Guide: https://y2.dev/docs/api/x402.

- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

Collected public records only. Check source status for coverage and freshness.