CVE-2023-37269

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Summary

CVECVE-2023-37269
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-07-07 22:15:00 UTC
Updated2024-01-25 21:02:00 UTC
DescriptionWinter 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 super user level permissions in Winter CMS. This means they would already have extensive access and control within the system. Additionally, to execute the XSS, the attacker would need to convince the victim to directly visit the URL of the maliciously uploaded SVG, and the application would have to be using local storage where uploaded files are served under the same domain as the application itself instead of a CDN. This is because all SVGs in Winter CMS are rendered through an `img` tag, which prevents any payloads from being executed directly. These two factors significantly limit the potential harm of this vulnerability. This issue has been patched in v1.2.3 through the inclusion of full support for SVG uploads and automatic sanitization of uploaded SVG files. As a workaround, one may apply the patches manually.

Risk And Classification

Problem Types: CWE-79

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Wintercms Winter All All All All

References

ReferenceSourceLinkTags
Stored XSS through privileged upload of SVG file · Advisory · wintercms/winter · GitHub MISC github.com
WinterCMS 1.2.2 Cross Site Scripting ≈ Packet Storm MISC packetstormsecurity.com
Add support for uploading SVGs · wintercms/storm@186d85d · GitHub MISC github.com
Release v1.2.3 · wintercms/winter · GitHub MISC github.com
Add support for uploading SVGs · wintercms/winter@fa50b4c · GitHub MISC github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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