TYPO3 Fluid Engine (package `typo3fluid/fluid`) before versions 2.0.5, 2.1.4, 2.2.1, 2.3.5, 2.4.1, 2.5.5 or 2.6.1 is vulnerable to cross-site scripting when making use of the ternary conditional operator in templates like `{showFullName ? fullName : defaultValue}`. Updated versions of this package are bundled in following TYPO3 (`typo3/cms-core`) versions as well: TYPO3 v8.7.25 (using `typo3fluid/fluid` v2.5.4) and TYPO3 v9.5.6 (using `typo3fluid/fluid` v2.6.1).
Source: https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-15241
Reference (s):
- https://github.com/TYPO3/Fluid/security/advisories/GHSA-7733-hjv6-4h47
- URL: https://github.com/TYPO3/Fluid/security/advisories/GHSA-7733-hjv6-4h47
- https://github.com/TYPO3/Fluid/commit/9ef6a8ffff2e812025fc0701b4ce72eea6911a3d
- URL: https://github.com/TYPO3/Fluid/commit/9ef6a8ffff2e812025fc0701b4ce72eea6911a3d
- https://typo3.org/security/advisory/typo3-core-sa-2019-013