{"id":"GHSA-fr6r-p8hv-x3c4","summary":"Umbraco Vulnerable to By-Pass of Configured Allowed Extensions for File Uploads","details":"### Impact\nVia a manipulated API request it's possible to upload a file that doesn't adhere with the configured allowable file extensions.\n\n### Patches\nPatched in 15.4.2 and 16.0.0.\n\n### Workarounds\nNone available.","aliases":["CVE-2025-48953"],"modified":"2025-06-05T00:08:18.494673Z","published":"2025-06-04T23:50:55Z","database_specific":{"nvd_published_at":"2025-06-03T19:15:39Z","cwe_ids":["CWE-434"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2025-06-04T23:50:55Z"},"references":[{"type":"WEB","url":"https://github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-fr6r-p8hv-x3c4"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-48953"},{"type":"WEB","url":"https://github.com/umbraco/Umbraco-CMS/commit/d920e93d1ee29dc3301697e444f53e8cd5db3cf9"},{"type":"PACKAGE","url":"https://github.com/umbraco/Umbraco-CMS"}],"affected":[{"package":{"name":"Umbraco.Cms","ecosystem":"NuGet","purl":"pkg:nuget/Umbraco.Cms"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"14.0.0"},{"fixed":"15.4.2"}]}],"versions":["14.0.0","14.1.0","14.1.0-rc","14.1.0-rc2","14.1.1","14.1.2","14.2.0","14.2.0-rc","14.2.0-rc2","14.2.0-rc3","14.3.0","14.3.0-rc","14.3.1","14.3.2","14.3.3","14.3.4","15.0.0","15.0.0-rc1","15.0.0-rc2","15.0.0-rc3","15.0.0-rc4","15.1.0","15.1.0-rc","15.1.0-rc2","15.1.1","15.1.2","15.2.0","15.2.0-rc","15.2.1","15.2.2","15.2.3","15.3.0","15.3.0-rc","15.3.0-rc2","15.3.1","15.4.0","15.4.0-rc","15.4.0-rc2","15.4.1"],"database_specific":{"last_known_affected_version_range":"\u003c= 15.4.1","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/06/GHSA-fr6r-p8hv-x3c4/GHSA-fr6r-p8hv-x3c4.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:L/I:L/A:L"}]}