CVE-2026-32258CWE-79cross-site-scripting

CVE-2026-32258

High · published August 26, 2026

CVSS v3.1
8.1
EPSS
0%
Percentile
31.0
In the wild
Unconfirmed
What it is

Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. From 1.2.10 through 1.2.12, authenticated backend users with the backend.manage_editor permission can store custom Markup Styles that are compiled by the LESS parser and rendered without sanitization on every backend page, allowing stored cross-site scripting. This issue is fixed in version 1.2.13.

The record
Technical detail
CVSS v3.1
8.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00382 · 31.0th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-08-26T21:16Z
References (2)
https://github.com/wintercms/winter/commit/d28f0b9474af79cfaa80eeb9d691f7a7c4469720 · [email protected]https://github.com/wintercms/winter/security/advisories/GHSA-vgp4-2fc4-qff2 · [email protected]
EPSS history
Timeline
  • 28 AUG 06:38Z
    EPSS moved — → 0%
    epss
  • 26 AUG 16:49Z
    Winter: Stored XSS through Editor Settings custom styles
    cvelistv5