{"id":"CVE-2021-28931","details":"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.","aliases":["GHSA-748f-wv76-x9hg"],"modified":"2026-07-08T21:26:33.883616Z","published":"2021-07-07T15:15:08.120Z","references":[{"type":"ADVISORY","url":"https://github.com/bousalman/ForkCMS-arbitrary-upload/blob/main/README.md"},{"type":"ADVISORY","url":"https://github.com/forkcms/forkcms/releases/tag/5.9.2"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/forkcms/forkcms","events":[{"introduced":"2cc9248584a96e4d7e71468da000fdd2e65a5d7d"},{"last_affected":"2cc9248584a96e4d7e71468da000fdd2e65a5d7d"},{"fixed":"2cc9248584a96e4d7e71468da000fdd2e65a5d7d"}],"database_specific":{"cpe":"cpe:2.3:a:fork-cms:fork_cms:5.9.2:*:*:*:*:*:*:*","extracted_events":[{"introduced":"5.9.2"},{"last_affected":"5.9.2"}],"source":["CPE_STRING","REFERENCES"]}}],"versions":["5.9.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-28931.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}