1. A computer program product, comprising a non-transitory computer usable medium having a computer readable program code embodied therein, the computer readable program code adapted to be executed by a computer to implement a method, the method comprising: receiving, by a first system providing a data feed as a service, a request to publish within the data feed to one or more users a link to content stored by a second system; prior to publishing the link within the data feed, determining, by the first system, whether the content is at least potentially malicious, by applying at least one predefined rule to the link without retrieving the content from the second system; when it is determined that the content is not at least potentially malicious, publishing the link within the data feed, by the first system, for allowing the one or more users to access the content from the second system via selection of the link within the data feed; and, when it is determined that the content is at least potentially malicious: retrieving, by the first system, the content from the second system using the link, determining, by the first system, which portion of the retrieved content is at least potentially malicious, cleaning, by the first system, the portion determined to be at least potentially malicious, storing the cleaned content in memory of the first system, creating, by the first system, a new link to the stored cleaned content, and publishing within the data feed, by the first system, the new link to the stored cleaned content.