Several vulnerabilities have been found in cacti, a frontend to rrdtool for monitoring systems and services. The Common Vulnerabilities and Exposures project identifies the following problems: It was discovered that cacti is prone to a denial of service via the graph_height, graph_width, graph_start and graph_end parameters. This issue only affects the oldstable version of cacti. It was discovered that cacti is prone to several cross-site scripting attacks via different vectors. It has been discovered that cacti allows authenticated administrator users to gain access to the host system by executing arbitrary commands via the "Data Input Method" for the "Linux - Get Memory Usage" setting. There is no fix for this issue at this stage. Upstream will implement a whitelist policy to only allow certain "safe" commands. For the moment, we recommend that such access is only given to trusted users and that the options "Data Input" and "User Administration" are otherwise deactivated.