CVE-2023-52083: Stored XSS through privileged upload of Media Manager file followed by renaming

Severity: medium (CVSS 4.8 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: 2023-12-28 · updated 2026-06-17
Weakness: CWE-79

Description

Winter is a free, open-source content management system. Prior to 1.2.4, users with the `media.manage_media` permission can upload files to the Media Manager and rename them after uploading. Previously, media manager files were only sanitized on upload, not on renaming, which could have allowed a stored XSS attack. This issue has been patched in v1.2.4.

Affected products

wintercms winter: before 1.2.4 — fixed in 1.2.4

How to fix

Upgrade to a fixed version: wintercms winter 1.2.4. Check the vendor advisory for mitigations.

References

https://github.com/wintercms/winter/commit/2969daeea8dee64d292dbaa3778ea251e2a7e491
https://github.com/wintercms/winter/security/advisories/GHSA-4wvw-75qh-fqjp
https://github.com/wintercms/winter/commit/2969daeea8dee64d292dbaa3778ea251e2a7e491
https://github.com/wintercms/winter/security/advisories/GHSA-4wvw-75qh-fqjp

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