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SCA: security update for winter/wn-backend-module (GHSA-58fp-mcx6-7qf9)

medium Tenable Cloud Security Plugin ID 446202

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - Winter CMS is a content management system built on the Laravel PHP framework. In versions up to and
 including 1.2.12, authenticated backend users can disclose arbitrary files readable by the PHP process by
 injecting @import (inline) directives into LESS source that the backend compiles, because the LESS parser
 was instantiated without a safe import resolver and fell back to the raw attacker-supplied path when no
 allowed root matched. The flaw is reachable through four entry points that share the same root cause: the
 Brand Settings custom_css field, the Editor Settings html_custom_styles field, the Mail Brand Settings
 colour-picker fields whose values are concatenated into LESS source without escaping, and theme .less,
 .sass, and .scss assets compiled when served. Both absolute paths and .. traversal outside the asset's own
 tree were accepted, so an attacker could read any file the web process can access, most significantly the
 application .env file and the APP_KEY and database credentials it contains. Exploitation requires a
 backend account holding one of the associated permissions, which are assigned by default to the built-in
 Developer role. This issue is fixed in version 1.2.13. (CVE-2026-63179)

Solution

Update the winter/wn-backend-module library and its related packages to version 1.2.13 or later.

See Also

https://github.com/advisories/GHSA-58fp-mcx6-7qf9

Plugin Details

Severity: Medium

ID: 446202

Version: Revision 1.2

Type: Local

Family: SCA Checks

Published: 8/21/2026

Updated: 8/27/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.66

Vendor

Vendor Severity: Medium

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

Vector: CVSS2#AV:N/AC:L/Au:M/C:C/I:N/A:N

CVSS Score Source: CVE-2026-63179

CVSS v3

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 4.3

Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 8/20/2026

Vulnerability Publication Date: 8/20/2026

Reference Information

CVE: CVE-2026-63179

cwe: CWE-22