TYPO3 before 4.2.13, 4.3.x before 4.3.4 and 4.4.x before 4.4.1 allows information disclosure in the mail header of the HTML mailing API.
bugs.debian.org/cgi-bin/bugreport.cgi?bug=590719
github.com/TYPO3-CMS/core
github.com/TYPO3/typo3/commit/3e24a0fff04897826a12e5cac16b5b0a3848cf2d
github.com/TYPO3/typo3/commit/46693d4930d0bce64c5bdd4274224724041cef2f
github.com/TYPO3/typo3/commit/a3a62d99507a9e686274306df0cc1c31f4394981
nvd.nist.gov/vuln/detail/CVE-2010-3673
security-tracker.debian.org/tracker/CVE-2010-3673
typo3.org/security/advisory/typo3-sa-2010-012/#Information_Disclosure