CVE-2026-79773

Medium

Description

Winter CMS before 1.2.13 contains a local file inclusion vulnerability in the JavascriptImporter filter that allows authenticated users with cms.manage_assets permission to disclose arbitrary server-readable files by placing =include or =require directives in theme JavaScript assets. Attackers can reference files like .env outside the theme directory, and the combined output served through the combine route becomes readable by unauthenticated visitors, exposing application keys and database credentials.

SeverityMedium

CVSS4.9

Exploit probability—

ProductWinter/wn-system-module

PublishedAug 25, 2026

First seenAug 25, 2026

Weakness typeCWE-22Path traversal

How to fix

Update

winter/wn-system-module1.2.13 or later

Patches

Vendor advisories

github.com/wintercms/winter/security/advisories/GHSA-2223-f22x-24cq

Affected products

Product	Affected versions	Fixed in
winter/wn-system-modulePackagist	v < 1.2.13	1.2.13

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