{"answers":{"affected":"2 open source packages ship an affected version, including file-upload-with-preview. It affects 1 product.","exploited":"There is no known exploitation of CVE-2021-23439 in the wild and no public exploit code.","fix":"Upgrade file-upload-with-preview to 4.2.0 or later.","what":"CVE-2021-23439 is a medium-severity cross-site scripting vulnerability in file-upload-with-preview, published on 5 Sep 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2021-23439 and fix it if it is affected.\n\nWhat it is: CVE-2021-23439 is a medium-severity cross-site scripting vulnerability in file-upload-with-preview, published on 5 Sep 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2021-23439 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- file-upload-with-preview (npm): affected all versions; fixed in 4.2.0\n- file-upload-with-preview (npm): affected all versions; fixed in 4.2.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2021-23439/ (Markdown: https://insights.sbomify.com/CVE-2021-23439/index.md)","id":"CVE-2021-23439","markdown":"https://insights.sbomify.com/CVE-2021-23439/index.md","name":"CVE-2021-23439","record":{"aliases":["GHSA-97pv-4338-r5vp"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":false,"product_category":"npm file upload library","requires_auth":"none","summary":"An attacker can execute arbitrary JavaScript by tricking a user into uploading a file with a malicious name in the file-upload-with-preview library.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"snyk","cpe":[{"product":"file-upload-with-preview","vendor":"johndatserakis"}],"cvss":{"score":4.2,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"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).","ecosystems":["npm"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Cross-site Scripting (XSS)","id":"CVE-2021-23439","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"npm","product":null,"products":[],"type":"xss","year":"2021"},"n_packages":2,"n_references":3,"next":{"headline":"Prototype Pollution","id":"CVE-2021-23440"},"packages":[{"ecosystem":"npm","fixed":["4.2.0"],"introduced":["0"],"last_affected":[],"package":"file-upload-with-preview","purl":null,"source":"GHSA-97pv-4338-r5vp"},{"ecosystem":"npm","fixed":["4.2.0"],"introduced":["0"],"last_affected":[],"package":"file-upload-with-preview","purl":"pkg:npm/file-upload-with-preview","source":"GHSA-97pv-4338-r5vp"}],"prev":{"headline":"Prototype Pollution","id":"CVE-2021-23438"},"products":["file-upload-with-preview"],"published":"2021-09-05","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-09-16","vendors":["n/a"]},"summary":"An attacker can execute arbitrary JavaScript by tricking a user into uploading a file with a malicious name in the file-upload-with-preview library.","url":"https://insights.sbomify.com/CVE-2021-23439/"}