{"action":"Upgrade typo3/cms to 10.4.14 or later.","affected":[{"fixed":"10.4.14","introduced":"10.0.0"},{"fixed":"11.1.1","introduced":"11.0.0"}],"component":"typo3/cms","cve_ids":["CVE-2021-21358"],"ecosystem":"Packagist","epss":0.00872,"exploited":false,"fixed_versions":["10.4.14","11.1.1"],"ghsa_id":"GHSA-x79j-wgqv-g8h2","id":"tcs_01M5KFASY520WKN1C2DB18PYYZ","modified_at":"2026-07-08T06:29:07.138120904Z","published_at":"2021-03-23T01:54:06Z","references":["https://osv.dev/vulnerability/GHSA-x79j-wgqv-g8h2","https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-x79j-wgqv-g8h2","https://nvd.nist.gov/vuln/detail/CVE-2021-21358","https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-21358.yaml","https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-21358.yaml","https://packagist.org/packages/typo3/cms-form","https://typo3.org/security/advisory/typo3-core-sa-2021-004"],"severity":{"label":"medium","score":5.4},"sources":[{"source":"osv","source_id":"GHSA-x79j-wgqv-g8h2#Packagist/typo3/cms","url":"https://osv.dev/vulnerability/GHSA-x79j-wgqv-g8h2"}],"summary":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in typo3/cms-form"}