{"id":"GHSA-8mq9-fqv8-59wf","aliases":["BIT-typo3-2021-32667","CVE-2021-32667"],"title":"Cross-Site Scripting in Page Preview","description":"> ### Meta\n> * CVSS: `CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N/E:F/RL:O/RC` (5.0)\n\n### Problem\nFailing to properly encode _Page TSconfig_ settings, corresponding page preview module (_Web>View_) is vulnerable to persistent cross-site scripting. A valid backend user account is needed to exploit this vulnerability.\n\n### Solution\nUpdate to TYPO3 versions 9.5.28, 10.4.18, 11.3.1 that fix the problem described.\n\n### Credits\nThanks to TYPO3 core merger Oliver Bartsch who reported and fixed the issue.\n\n### References\n* [TYPO3-CORE-SA-2021-009](https://typo3.org/security/advisory/typo3-core-sa-2021-009)","severity":"medium","score":6.4,"published":"2021-07-22T19:34:43.000Z","modified":"2026-07-08T06:29:29.237Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"typo3/cms-core","ranges":[{"events":[{"introduced":"9.0.0"},{"fixed":"9.5.28"}],"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","v9.5.23","v9.5.24","v9.5.25","v9.5.26","v9.5.27","v9.5.3","v9.5.4","v9.5.5","v9.5.6","v9.5.7","v9.5.8","v9.5.9"],"fixed":["9.5.28"]},{"ecosystem":"Packagist","name":"typo3/cms-core","ranges":[{"events":[{"introduced":"10.0.0"},{"fixed":"10.4.18"}],"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","v10.4.10","v10.4.11","v10.4.12","v10.4.13","v10.4.14","v10.4.15","v10.4.16","v10.4.17","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":["10.4.18"]},{"ecosystem":"Packagist","name":"typo3/cms-core","ranges":[{"events":[{"introduced":"11.0.0"},{"fixed":"11.3.1"}],"type":"ECOSYSTEM"}],"versions":["v11.0.0","v11.1.0","v11.1.1","v11.2.0","v11.3.0"],"fixed":["11.3.1"]},{"ecosystem":"Packagist","name":"typo3/cms","ranges":[{"events":[{"introduced":"10.0.0"},{"fixed":"10.4.18"}],"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","v10.4.10","v10.4.11","v10.4.12","v10.4.13","v10.4.14","v10.4.15","v10.4.16","v10.4.17","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":["10.4.18"]},{"ecosystem":"Packagist","name":"typo3/cms","ranges":[{"events":[{"introduced":"11.0.0"},{"fixed":"11.3.1"}],"type":"ECOSYSTEM"}],"versions":["v11.0.0","v11.1.0","v11.1.1","v11.2.0","v11.3.0"],"fixed":["11.3.1"]},{"ecosystem":"Packagist","name":"typo3/cms","ranges":[{"events":[{"introduced":"9.0.0"},{"fixed":"9.5.28"}],"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","v9.5.23","v9.5.24","v9.5.25","v9.5.26","v9.5.27","v9.5.3","v9.5.4","v9.5.5","v9.5.6","v9.5.7","v9.5.8","v9.5.9"],"fixed":["9.5.28"]}],"references":["https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-8mq9-fqv8-59wf","https://github.com/TYPO3/typo3/security/advisories/GHSA-8mq9-fqv8-59wf","https://nvd.nist.gov/vuln/detail/CVE-2021-32667","https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2021-32667.yaml","https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2021-32667.yaml","https://github.com/TYPO3/typo3","https://typo3.org/security/advisory/typo3-core-sa-2021-009"],"sources":[{"name":"OSV","id":"GHSA-8mq9-fqv8-59wf","modified":"2026-07-08T06:29:29.237450795Z","url":"https://osv.dev/vulnerability/GHSA-8mq9-fqv8-59wf"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N","score":6.4}]}