Unspecified vulnerability in the session handling feature in freeCap CAPTCHA (sr_freecap) extension 1.2.0 and earlier for TYPO3 has unknown impact and attack vectors.
https://euvd.enisa.europa.eu/vulnerability/EUVD-2009-3790
http://typo3.org/teams/security/security-bulletins/typo3-sa-2009-014/