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TI-2026-17864 Aliases CVE-2026-22254GHSA-m7gw-rffq-rxjm

Winter Affected by Stored Cross-Site Scripting (XSS) in Asset Manager

Priority LOW 17CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Required
Attack complexity
Low
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-79.

Summary

Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. Versions of Winter CMS before 1.2.10 allow users with access to the CMS Asset Manager were able to upload SVGs without automatic sanitization. To actively exploit this security issue, an attacker would need access to the Backend with a user account with the following permission: cms.manage_assets. The Winter CMS maintainers strongly recommend that the cms.manage_assets permission only be reserved to trusted administrators and developers in general. This vulnerability is fixed in 1.2.10.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00286 21st percentileScored 2026-11-07
Fix Fixed winter (wintercms): 1.2.10winter/wn-cms-module (Packagist): 1.2.10

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
wintercmswinterbefore 1.2.101.2.10Patch availableCNA
—winter/wn-cms-module (Packagist)before 1.2.101.2.10Patch availableGHSA-m7gw-rffq-rxjm
  • winter Vendorwintercms Affected before 1.2.10 Fixed in 1.2.10 Patch available CNA
  • winter/wn-cms-module (Packagist) Vendor— Affected before 1.2.10 Fixed in 1.2.10 Patch available GHSA-m7gw-rffq-rxjm

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:wintercms:winter:*:*:*:*:*:*:*:*before 1.2.10Vulnerablewintercms
  • cpe:2.3:a:wintercms:winter:*:*:*:*:*:*:*:* Versions before 1.2.10 Vulnerable ·wintercms

Remediation

  • Fix · CNA winter (wintercms) Fixed in 1.2.10
  • Fix · GHSA-m7gw-rffq-rxjm winter/wn-cms-module (Packagist) Fixed in 1.2.10 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-22254
  2. 2026-10-03 Alias added: GHSA-m7gw-rffq-rxjm

References

Patch 2

Advisory 1

Other 2

  • TI-2024-19497 Server-side Template Injection (SSTI) vulnerability in Winter CMS v.1.2.3 allows a remote… CVSS 3.1HIGH 7.2
  • TI-2023-28528 Winter CMS Local File Inclusion through Server Side Template Injection CVSS 3.1MEDIUM 5.4
  • TI-2022-18732 Winter vulnerable to Prototype Pollution in Snowboard framework CVSS 3.1CRITICAL 9.8
  • TI-2026-21979 Winter: Privilege escalation by authenticated backend users CVSS 3.1CRITICAL 10.0
  • TI-2024-36264 Winter CMS Modules allows a sandbox bypass in Twig templates leading to data modification and deletion CVSS 3.1HIGH 8.5
  • TI-2023-18899 Winter CMS vulnerable to stored XSS through privileged upload of SVG file CVSS 3.1MEDIUM 4.8
See all 8 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences