CVE-2023-37269 — Winter is a free, open-source content management system (CMS) based on the Larav
Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. Users with the `backend.manage_branding` permission can upload SVGs as the application logo. Prior to version 1.2.3, SVG uploads were not sanitized, which could have allowed a stored
Published
2023-07-07T21:19:38.971Z
Last modified
2025-02-13T16:56:39.365Z
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N
01What is this vulnerability?
Winter is a free, open-source content management system (CMS) based on the Laravel PHP framework. Users with the `backend.manage_branding` permission can upload SVGs as the application logo. Prior to version 1.2.3, SVG uploads were not sanitized, which could have allowed a stored cross-site scripting (XSS) attack. To exploit the vulnerability, an attacker would already need to have developer or…
02Affected products
| Vendor | Product | Versions |
|---|
| wintercms | winter | < 1.2.3 |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2023-07-07T21:19:38.971Z
- Last modified: 2025-02-13T16:56:39.365Z
09References
- github.com — https://github.com/wintercms/winter/security/advisories/GHSA-wjw2-4j7j-6gc3
- github.com — https://github.com/wintercms/storm/commit/186d85d8fea2cae43afc807d39f68553c24e56…
- github.com — https://github.com/wintercms/winter/commit/fa50b4c7489b67ea80072f8ac9fe5294fce1d…
- github.com — https://github.com/wintercms/winter/releases/tag/v1.2.3
- packetstormsecurity.com — http://packetstormsecurity.com/files/173520/WinterCMS-1.2.2-Cross-Site-Scripting…
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