{"id":"CVE-2020-15099","aliases":["BIT-typo3-2020-15099","GHSA-3x94-fv5h-5q2c"],"url":"https://o3.security/vulnerability/CVE-2020-15099","summary":"Exposure of Sensitive Information to an Unauthorized Actor in TYPO3 CMS","details":"In TYPO3 CMS greater than or equal to 9.0.0 and less than 9.5.20, and greater than or equal to 10.0.0 and less than 10.4.6, in a case where 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. In case a database server is directly accessible either via internet or in a shared hosting network, this allows the ability 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. This has been patched in versions 9.5.20 and 10.4.6.","published":"2020-07-29T17:15:13.497Z","modified":"2026-08-27T08:14:57.251207Z","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Packagist","name":"typo3/cms-core","fixedVersion":"9.5.20"},{"ecosystem":"Packagist","name":"typo3/cms-core","fixedVersion":"10.4.6"},{"ecosystem":"Packagist","name":"typo3/cms","fixedVersion":"10.4.6"},{"ecosystem":"Packagist","name":"typo3/cms","fixedVersion":"9.5.20"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/TYPO3/TYPO3.CMS/security/advisories/GHSA-3x94-fv5h-5q2c"},{"type":"ADVISORY","url":"https://typo3.org/security/advisory/typo3-core-sa-2020-007"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-27T08:14:57.251207Z"}}