# CVE-2026-125341: Winter CMS: Stored XSS through Backend List widget image columns

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

Winter CMS is a content management system built on the Laravel PHP framework. From 1.1.0 until 1.2.14, Backend\Widgets\Lists::evalImageTypeValue() interpolates the result of ImageResizer::filterGetUrl() into a single-quoted image source attribute without escaping it. In a third-party plugin that renders an attacker-influenced value through an image list column, an unsupported image value is returned verbatim, can break out of the attribute, and can inject event handlers that execute when a backend user views the list. Winter core ships no image list column, so a default installation is unaffected. This issue is fixed in version 1.2.14.

## Remediation

- fix: winter/wn-backend-module (Packagist): OSV reports a fixed version 1.2.14. Check the advisory for supported release branches. (source: OSV GHSA-7mpf-4465-7fc2) — https://github.com/advisories/GHSA-7mpf-4465-7fc2

## Affected products and versions

- wintercms / winter: >= 1.1.0, < 1.2.14 (affected). Source: CNA: GitHub_M
-  / winter/wn-backend-module (winter/wn-backend-module): v1.1.10 (affected, Packagist); v1.1.11 (affected, Packagist); v1.1.2 (affected, Packagist); v1.1.3 (affected, Packagist); v1.1.4 (affected, Packagist); v1.1.5 (affected, Packagist); v1.1.6 (affected, Packagist); v1.1.7 (affected, Packagist); v1.1.8 (affected, Packagist); v1.1.9 (affected, Packagist); v1.2.0 (affected, Packagist); v1.2.1 (affected, Packagist); v1.2.10 (affected, Packagist); v1.2.11 (affected, Packagist); v1.2.12 (affected, Packagist); v1.2.13 (affected, Packagist); v1.2.2 (affected, Packagist); v1.2.3 (affected, Packagist); v1.2.4 (affected, Packagist); v1.2.5 (affected, Packagist); v1.2.6 (affected, Packagist); v1.2.7 (affected, Packagist); v1.2.8 (affected, Packagist); v1.2.9 (affected, Packagist); Ecosystem version events: introduced 1.1.0; fixed 1.2.14. Source: OSV GHSA-7mpf-4465-7fc2

## Severity and prioritization

- CVSS 3.1: 2 (low); CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N; source: CNA: GitHub_M

- CISA KEV: No listing in collected sources

- EPSS: Not available

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

- Weaknesses: CWE-79

## Exploit evidence

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

## References

- https://github.com/wintercms/winter/security/advisories/GHSA-7mpf-4465-7fc2 (CNA: GitHub_M; x_refsource_CONFIRM)

- https://github.com/wintercms/winter/commit/0941c9816181095fe35d58e78e6d0c4a49238967 (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/advisories/GHSA-7mpf-4465-7fc2 (OSV / GitHub Security Advisories; advisory)

- https://osv.dev/vulnerability/GHSA-7mpf-4465-7fc2 (OSV / GitHub Security Advisories; osv)

## Provenance

- CNA: GitHub_M: https://www.cve.org/CVERecord?id=CVE-2026-125341; retrieved 2026-11-10; source updated 2026-11-10

- OSV / GitHub Security Advisories: https://osv.dev/vulnerability/GHSA-7mpf-4465-7fc2; retrieved 2026-11-10; source updated 2026-11-10

Revision: 904b8c42b3063b7c010be3c7fb543b1df954d9957f31b7acf071c71e67802543

Canonical: https://y2.dev/cve/CVE-2026-125341

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