{"id":"GHSA-748f-wv76-x9hg","aliases":["CVE-2021-28931"],"title":"Arbitrary file upload in Fork CMS","titleSource":"OSV","descriptionSource":"OSV","declaredSeverity":"HIGH","description":"Arbitrary file upload vulnerability in Fork CMS 5.9.2 allows attackers to create or replace arbitrary files in the /themes directory via a crafted zip file uploaded to the Themes panel.","severity":"high","score":8.8,"published":"2021-09-08T17:26:26.000Z","modified":"2023-11-08T04:05:32.057Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"forkcms/forkcms","sources":[{"name":"OSV · GHSA-748f-wv76-x9hg","url":"https://osv.dev/vulnerability/GHSA-748f-wv76-x9hg"}],"ranges":[{"events":[{"introduced":"0"},{"fixed":"5.9.3"}],"type":"ECOSYSTEM"}],"versions":["3.5.0","3.5.1","3.6.0","3.6.1","3.6.2","3.6.3","3.6.4","3.6.5","3.6.6","3.7","3.7.1","3.7.2","3.7.3","3.8.0","3.8.1","3.8.2","3.8.3","3.8.4","3.8.5","3.8.6","3.8.7","3.9.0","3.9.1","3.9.2","3.9.3","3.9.4","3.9.5","3.9.6","4.0.0","4.0.1","4.0.2","4.0.3","4.0.4","4.0.5","4.0.6","4.1.0","4.1.1","4.1.2","4.2.0","4.2.1","4.2.2","4.2.3","4.2.4","4.3.0","4.3.1","4.4.0","4.4.1","4.5.0","4.5.1","4.5.2","4.5.3","4.5.4","4.5.5","5.0.0","5.0.1","5.0.2","5.0.3","5.0.4","5.0.5","5.0.6","5.0.7","5.1.0","5.2.0","5.2.1","5.2.2","5.2.3","5.3.0","5.3.1","5.4.0","5.4.1","5.5.0","5.5.1","5.5.2","5.6.0","5.6.1","5.6.2","5.7.0","5.7.1","5.8.0","5.8.1","5.8.2","5.8.3","5.9.0","5.9.1","5.9.2"],"fixed":["5.9.3"]}],"sourceAffected":[],"references":["https://nvd.nist.gov/vuln/detail/CVE-2021-28931","https://github.com/forkcms/forkcms/pull/3351","https://github.com/bousalman/ForkCMS-arbitrary-upload/blob/main/README.md","https://github.com/forkcms/forkcms/releases/tag/5.9.2"],"sources":[{"name":"OSV","id":"GHSA-748f-wv76-x9hg","modified":"2023-11-08T04:05:32.057899Z","url":"https://osv.dev/vulnerability/GHSA-748f-wv76-x9hg"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8}],"products":[],"remediation":[],"kev":{"status":"not-listed","checkedAt":"2026-10-29T01:45:31.656Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}