Security issue in third party extension "powermail" (powermail)

Security vulnerabilities have been discovered in the third party TYPO3 extension "powermail" (powermail)

For further information on the issue in extension "powermail" (powermail), please read the related advisory TYPO3-SA-2011-004 that
was published today:
https://typo3.org/security/advisory/typo3-sa-2011-004/

In general the TYPO3 Security Team recommends to read the following pages:

• The TYPO3 Security Guide: https://docs.typo3.org/m/typo3/reference-coreapi/main/en-us/Security/Index.html#security-guidelines
• Make sure you are subscribed to the TYPO3 Announce List: http://lists.typo3.org/cgi-bin/mailman/listinfo/typo3-announce
• See all TYPO3 security advisories