Winter CMS Local File Inclusion through Server Side Template Injection

published 2023-12-29 2 y ago modified 2026-09-10 1 mo ago also GHSA-2x7r-93ww-cxrq , EUVD-2024-0225

cvss: 3.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 30.2%; EPSS 30.2% chance of exploitation in 30 days, percentile 98%
public exploits: 0; none known, plus a Nuclei check

Winter is a free, open-source content management system. Users with access to backend forms that include a ColorPicker FormWidget can provide a value that would then be included without further processing in the compilation of custom stylesheets via LESS. This had the potential to lead to a Local File Inclusion vulnerability. This issue has been patched in v1.2.4.

Patch / fix

fixed in 2 links 2

packagist winter/wn-backend-module 1.2.4
wintercms winter 1.2.4

Exploit prediction

30.17% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Nuclei template Winter CMS Local File Inclusion - (LFI) nuclei detection template

CVSS scores

assigned by	version	score	vector
CNA	3.1	3.3	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N
NVD	3.1	5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
GitHub	3.1	3.3	CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N

Affected packages

ecosystem	package	affected	fixed in
packagist	winter/wn-backend-module	<1.2.4	1.2.4

Affected products

wintercms winter

Classification

Weakness

CWE-22 Improper Limitation of a Pathname to a Restricted Directory

References

github.com /wintercms/winter/commit/5bc9257fe2bc47d8b786a1b1bf96bafad23d8ddd
web, patch
github.com /wintercms/winter/security/advisories/GHSA-2x7r-93ww-cxrq
web, patch, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2023-52085
advisory
github.com /wintercms/winter
package

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary