GHSA-x428-565f-8xj2: TYPO3 Arbitrary Code Execution and Cross-Site Scripting in Backend API
Backend API configuration using Page TSconfig is vulnerable to arbitrary code execution and cross-site scripting. TSconfig fields of page properties in backend forms can be used to inject malicious sequences. Field tsconfig_includes is vulnerable to directory traversal leading to same scenarios as having direct access to TSconfig settings.
A valid backend user account having access to modify values for fields pages.TSconfig and pages.tsconfig_includes is needed in order to exploit this vulnerability.
References
- github.com/FriendsOfPHP/security-advisories/blob/master/typo3/cms-core/2019-06-25-4.yaml
- github.com/TYPO3-CMS/core
- github.com/TYPO3-CMS/core/commit/3a99a0877de6ad9cb39ba73146292b90e13294db
- github.com/TYPO3-CMS/core/commit/822e62ec267fbe3c70a26f1c4f73f47fc615c930
- github.com/advisories/GHSA-x428-565f-8xj2
- typo3.org/security/advisory/typo3-core-sa-2019-019
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