CVE-2023-52085: Winter CMS Local File Inclusion through Server Side Template Injection

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 30.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-12-29 · updated 2026-06-17
Weakness: CWE-22

Description

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.

Affected products

wintercms winter: before 1.2.4 — fixed in 1.2.4

How to fix

Upgrade to a fixed version: wintercms winter 1.2.4. Check the vendor advisory for mitigations.

References

https://github.com/wintercms/winter/commit/5bc9257fe2bc47d8b786a1b1bf96bafad23d8ddd
https://github.com/wintercms/winter/security/advisories/GHSA-2x7r-93ww-cxrq
https://github.com/wintercms/winter/commit/5bc9257fe2bc47d8b786a1b1bf96bafad23d8ddd
https://github.com/wintercms/winter/security/advisories/GHSA-2x7r-93ww-cxrq

Get alerted when CVE-2023-52085 or the next vulnerability affects your stack