{"id":"GHSA-vqqx-jw6p-q3rf","aliases":["BIT-typo3-2020-26227","CVE-2020-26227"],"title":"Cross-Site Scripting in Fluid view helpers","description":"> ### Meta\n> * CVSS: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC:C` (5.7)\n> * CWE-79\n\n### Problem\nIt has been discovered that system extension Fluid (`typo3/cms-fluid`) of the TYPO3 core is vulnerable to cross-site scripting passing user-controlled data as argument to Fluid view helpers.\n\n```\n<f:form ... fieldNamePrefix=\"{payload}\" />\n<f:be.labels.csh ... label=\"{payload}\" />\n<f:be.menus.actionMenu ... label=\"{payload}\" />\n```\n\n### Solution\nUpdate to TYPO3 versions 9.5.23 or 10.4.10 that fix the problem described.\n\n### Credits\nThanks to TYPO3 security team member Oliver Hader who reported this issue and to TYPO3 security team members Helmut Hummel & Oliver Hader who fixed the issue.\n\n### References\n* [TYPO3-CORE-SA-2020-010](https://typo3.org/security/advisory/typo3-core-sa-2020-010)","severity":"medium","score":6.1,"published":"2020-12-21T16:28:11.000Z","modified":"2026-09-10T03:49:13.912Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"typo3/cms-core","ranges":[{"events":[{"introduced":"9.0.0"},{"fixed":"9.5.23"}],"type":"ECOSYSTEM"}],"versions":["v9.0.0","v9.1.0","v9.2.0","v9.2.1","v9.3.0","v9.3.1","v9.3.2","v9.3.3","v9.4.0","v9.5.0","v9.5.1","v9.5.10","v9.5.11","v9.5.12","v9.5.13","v9.5.14","v9.5.15","v9.5.16","v9.5.17","v9.5.18","v9.5.19","v9.5.2","v9.5.20","v9.5.21","v9.5.22","v9.5.3","v9.5.4","v9.5.5","v9.5.6","v9.5.7","v9.5.8","v9.5.9"],"fixed":["9.5.23"]},{"ecosystem":"Packagist","name":"typo3/cms-core","ranges":[{"events":[{"introduced":"10.0.0"},{"fixed":"10.4.10"}],"type":"ECOSYSTEM"}],"versions":["v10.0.0","v10.1.0","v10.2.0","v10.2.1","v10.2.2","v10.3.0","v10.4.0","v10.4.1","v10.4.2","v10.4.3","v10.4.4","v10.4.5","v10.4.6","v10.4.7","v10.4.8","v10.4.9"],"fixed":["10.4.10"]},{"ecosystem":"Packagist","name":"typo3/cms-core","ranges":[{"events":[{"introduced":"8.7.0"},{"fixed":"8.7.38"}],"type":"ECOSYSTEM"}],"versions":["v8.7.10","v8.7.11","v8.7.12","v8.7.13","v8.7.14","v8.7.15","v8.7.16","v8.7.17","v8.7.18","v8.7.19","v8.7.20","v8.7.21","v8.7.22","v8.7.23","v8.7.24","v8.7.25","v8.7.26","v8.7.27","v8.7.28","v8.7.29","v8.7.30","v8.7.31","v8.7.32","v8.7.7","v8.7.8","v8.7.9"],"fixed":["8.7.38"]},{"ecosystem":"Packagist","name":"typo3/cms","ranges":[{"events":[{"introduced":"10.0.0"},{"fixed":"10.4.10"}],"type":"ECOSYSTEM"}],"versions":["v10.0.0","v10.1.0","v10.2.0","v10.2.1","v10.2.2","v10.3.0","v10.4.0","v10.4.1","v10.4.2","v10.4.3","v10.4.4","v10.4.5","v10.4.6","v10.4.7","v10.4.8","v10.4.9"],"fixed":["10.4.10"]},{"ecosystem":"Packagist","name":"typo3/cms","ranges":[{"events":[{"introduced":"9.0.0"},{"fixed":"9.5.23"}],"type":"ECOSYSTEM"}],"versions":["v9.0.0","v9.1.0","v9.2.0","v9.2.1","v9.3.0","v9.3.1","v9.3.2","v9.3.3","v9.4.0","v9.5.0","v9.5.1","v9.5.10","v9.5.11","v9.5.12","v9.5.13","v9.5.14","v9.5.15","v9.5.16","v9.5.17","v9.5.18","v9.5.19","v9.5.2","v9.5.20","v9.5.21","v9.5.22","v9.5.3","v9.5.4","v9.5.5","v9.5.6","v9.5.7","v9.5.8","v9.5.9"],"fixed":["9.5.23"]},{"ecosystem":"Packagist","name":"typo3/cms","ranges":[{"events":[{"introduced":"8.7.0"},{"fixed":"8.7.38"}],"type":"ECOSYSTEM"}],"versions":["8.7.0","8.7.1","8.7.2","v8.7.10","v8.7.11","v8.7.12","v8.7.13","v8.7.14","v8.7.15","v8.7.16","v8.7.17","v8.7.18","v8.7.19","v8.7.20","v8.7.21","v8.7.22","v8.7.23","v8.7.24","v8.7.25","v8.7.26","v8.7.27","v8.7.28","v8.7.29","v8.7.3","v8.7.30","v8.7.31","v8.7.32","v8.7.4","v8.7.5","v8.7.6","v8.7.7","v8.7.8","v8.7.9"],"fixed":["8.7.38"]}],"sourceAffected":[],"references":["https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-vqqx-jw6p-q3rf","https://nvd.nist.gov/vuln/detail/CVE-2020-26227","https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-26227.yaml","https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-26227.yaml","https://packagist.org/packages/typo3/cms-core","https://typo3.org/security/advisory/typo3-core-sa-2020-010"],"sources":[{"name":"OSV","id":"GHSA-vqqx-jw6p-q3rf","modified":"2026-09-10T03:49:13.912621159Z","url":"https://osv.dev/vulnerability/GHSA-vqqx-jw6p-q3rf"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1}]}