{"id":"GHSA-3x94-fv5h-5q2c","summary":"Exposure of Sensitive Information to an Unauthorized Actor in TYPO3 CMS","details":"\u003e ### Meta\n\u003e * CVSS: `CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C` (7.5)\n\u003e * CWE-20, CWE-200\n\n### Problem\nIn case an attacker manages to generate a valid cryptographic message authentication code (HMAC-SHA1) - either by using a different existing vulnerability or in case the internal _encryptionKey_ was exposed - it is possible to retrieve arbitrary files of a TYPO3 installation. This includes the possibility to fetch _typo3conf/LocalConfiguration.php_ which again contains the _encryptionKey_ as well as credentials of the database management system being used.\n\nIn case a database server is directly accessible either via internet or in a shared hosting network, this allows to completely retrieve, manipulate or delete database contents. This includes creating an administration user account - which can be used to trigger remote code execution by injecting custom extensions.\n\n### Solution\nUpdate to TYPO3 versions 9.5.20 or 10.4.6 that fix the problem described.\n\n### Credits\nThanks to TYPO3 security team member Oliver Hader who reported and fixed the issue.\n\n### References\n* [TYPO3-CORE-SA-2020-007](https://typo3.org/security/advisory/typo3-core-sa-2020-007)","aliases":["BIT-typo3-2020-15099","CVE-2020-15099"],"modified":"2026-07-08T06:28:13.715151169Z","published":"2020-07-29T16:15:32Z","database_specific":{"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2020-07-29T16:14:57Z","nvd_published_at":"2020-07-29T17:15:00Z","cwe_ids":["CWE-20","CWE-200"]},"references":[{"type":"WEB","url":"https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-3x94-fv5h-5q2c"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2020-15099"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/CVE-2020-15099.yaml"},{"type":"WEB","url":"https://github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms/CVE-2020-15099.yaml"},{"type":"PACKAGE","url":"https://github.com/TYPO3/TYPO3.CMS"},{"type":"WEB","url":"https://typo3.org/security/advisory/typo3-core-sa-2020-007"}],"affected":[{"package":{"name":"typo3/cms-core","ecosystem":"Packagist","purl":"pkg:composer/typo3/cms-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.0.0"},{"fixed":"9.5.20"}]}],"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","v9.5.3","v9.5.4","v9.5.5","v9.5.6","v9.5.7","v9.5.8","v9.5.9"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/07/GHSA-3x94-fv5h-5q2c/GHSA-3x94-fv5h-5q2c.json"}},{"package":{"name":"typo3/cms-core","ecosystem":"Packagist","purl":"pkg:composer/typo3/cms-core"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"10.0.0"},{"fixed":"10.4.6"}]}],"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"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/07/GHSA-3x94-fv5h-5q2c/GHSA-3x94-fv5h-5q2c.json"}},{"package":{"name":"typo3/cms","ecosystem":"Packagist","purl":"pkg:composer/typo3/cms"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"10.0.0"},{"fixed":"10.4.6"}]}],"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"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/07/GHSA-3x94-fv5h-5q2c/GHSA-3x94-fv5h-5q2c.json"}},{"package":{"name":"typo3/cms","ecosystem":"Packagist","purl":"pkg:composer/typo3/cms"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"9.0.0"},{"fixed":"9.5.20"}]}],"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","v9.5.3","v9.5.4","v9.5.5","v9.5.6","v9.5.7","v9.5.8","v9.5.9"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/07/GHSA-3x94-fv5h-5q2c/GHSA-3x94-fv5h-5q2c.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}