{"action":"Upgrade typo3/cms-form to 8.7.40 or later.","affected":[{"fixed":"8.7.40","introduced":"8.0.0"},{"fixed":"9.5.25","introduced":"9.0.0"},{"fixed":"10.4.14","introduced":"10.0.0"},{"fixed":"11.1.1","introduced":"11.0.0"}],"component":"typo3/cms-form","cve_ids":["CVE-2021-21355"],"ecosystem":"Packagist","epss":0.01631,"exploited":false,"fixed_versions":["8.7.40","9.5.25","10.4.14","11.1.1"],"ghsa_id":"GHSA-2r6j-862c-m2v2","id":"tcs_01M5KES7PARRAVJ0QECV3TMHHJ","modified_at":"2026-07-08T06:29:29.299723425Z","published_at":"2021-03-23T01:53:52Z","references":["https://osv.dev/vulnerability/GHSA-2r6j-862c-m2v2","https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-2r6j-862c-m2v2","https://nvd.nist.gov/vuln/detail/CVE-2021-21355","https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-21355.yaml","https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-21355.yaml","https://packagist.org/packages/typo3/cms-form","https://typo3.org/security/advisory/typo3-core-sa-2021-002"],"severity":{"label":"high","score":8.6},"sources":[{"source":"osv","source_id":"GHSA-2r6j-862c-m2v2","url":"https://osv.dev/vulnerability/GHSA-2r6j-862c-m2v2"}],"summary":"Unrestricted File Upload in Form Framework"}