{"id":"CVE-2021-23439","aliases":[],"url":"https://o3.security/vulnerability/CVE-2021-23439","summary":"Cross-site Scripting in file-upload-with-preview","details":"This affects the package file-upload-with-preview before 4.2.0. A file containing malicious JavaScript code in the name can be uploaded (a user needs to be tricked into uploading such a file).","published":"2021-09-07T23:08:54Z","modified":"2026-03-13T22:11:17.274119Z","cvss":{"score":4.2,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"file-upload-with-preview","fixedVersion":"4.2.0"}],"fix":{"url":"https://github.com/johndatserakis/file-upload-with-preview/pull/40/files?file-filters%5B%5D=.js&hide-deleted-files=true%23diff-fe47b243de17419c0daa22cd785cd754baed60cf3679d3da1d6fe006f9f4a7f0R174","label":"johndatserakis/file-upload-with-preview#40"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2021-23439"},{"type":"WEB","url":"https://github.com/johndatserakis/file-upload-with-preview/pull/40/files?file-filters%5B%5D=.js&hide-deleted-files=true%23diff-fe47b243de17419c0daa22cd785cd754baed60cf3679d3da1d6fe006f9f4a7f0R174"},{"type":"PACKAGE","url":"https://github.com/johndatserakis/file-upload-with-preview"},{"type":"WEB","url":"https://github.com/johndatserakis/file-upload-with-preview/blob/develop/src/file-upload-with-preview.js%23L168"},{"type":"WEB","url":"https://snyk.io/vuln/SNYK-JS-FILEUPLOADWITHPREVIEW-1579492"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-03-13T22:11:17.274119Z"}}