What’s Vulnerable › Vulnerabilities

CVE-2026-22254: Winter Affected by Stored Cross-Site Scripting (XSS) in Asset Manager

• Severity: low (CVSS 3.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-06 · updated 2026-06-17
• Weakness: CWE-79

Description

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.

Affected products

• wintercms winter: before 1.2.10 — fixed in 1.2.10

How to fix

Upgrade to a fixed version: wintercms winter 1.2.10. Check the vendor advisory for mitigations.

References

• https://github.com/wintercms/winter/commit/8a7f74b004fcd19721764fc63af0cdb339d9fb65
• https://github.com/wintercms/winter/releases/tag/v1.2.10
• https://github.com/wintercms/winter/security/advisories/GHSA-m7gw-rffq-rxjm

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