Is there a public exploit for CVE-2026-125338?

No public exploit for CVE-2026-125338 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-125338?

CVE-2026-125338 scores CVSS 4.5 (v3.1), rated medium. EPSS puts the chance of exploitation in the next 30 days at 0.4%.

What does CVE-2026-125338 affect?

CVE-2026-125338 affects wintercms winter.

4.5 Medium

Winter CMS is a content management system built on the Laravel PHP framework.

CVE-2026-125338

Winter CMS is a content management system built on the Laravel PHP framework. Prior to 1.2.14, BrandSetting::renderCss() and EditorSetting::renderCss() store raw LESS compiler output with Cache::forever() but apply striptags() only to the value returned on a cache miss. The first render after saving custom CSS appears sanitized while priming an unsafe cache entry, and later cache hits return unsanitized output into the backend style element, allowing a user with backend.managebranding or backend.manageeditor to cause stored cross-site scripting when another backend page renders the styles. The styles also appear on unauthenticated backend sign-in, password restore, and password reset layouts. This issue is fixed in version 1.2.14.

Assessment

CVSS: 4.5 (v3.1)
Severity: Medium
EPSS: 0.4% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 10 November 2026
Last updated: 14 November 2026
Affected: wintercms · winter
Assigner: GitHub_M

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:H/A:N

At the source

EUVD (ENISA)

References

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