The remote host is missing an update to mahara announced via advisory DSA 1924-1.

https://secure1.securityspace.com/smysecure/catid.html?in=DSA%201924-1

Two vulnerabilities have been discovered in, an electronic portfolio, weblog, and resume builder. The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2009-3298 Ruslan Kabalin discovered a issue with resetting passwords, which could lead to a privilege escalation of an institutional administrator account. CVE-2009-3299 Sven Vetsch discovered a cross-site scripting vulnerability via the resume fields. For the stable distribution (lenny), these problems have been fixed in version 1.0.4-4+lenny4. The oldstable distribution (etch) does not contain mahara. For the testing distribution (squeeze) and the unstable distribution (sid), this problem will be fixed soon. We recommend that you upgrade your mahara packages.