This paper aims to explore how researchers studied the role and implications of the concepts of vulnerability and risk in direct relation to knowledge management systems. Our approach is based on a bibliometric analysis of the papers in the last 20 years and indexed in Scopus using the specialized software VOSviewer. Although knowledge risks have been analyzed from different perspectives, knowledge vulnerabilities have not been studied yet. In any system, vulnerabilities represent the roots of all possible risks, and they should be known when systems are designed for diminishing the probable negative consequences of risks occurrences. VOSviewer analyses of different keywords and expressions related to the search topic show semantic clusters constructed with similar concepts and the intensity of the links between the focal concept and the other concepts. That allows us to see the knowledge gaps in the research area and how to orient the future research. Findings show that in the literature dedicated to knowledge management systems, there are no studies focusing on knowledge vulnerabilities, although they generate the knowledge risks when the context changes become favorable. Thus, our study shows a clear knowledge gap between the generic risk management theory and knowledge management systems with respect to knowledge vulnerabilities. The contribution of this paper comes from revealing this knowledge gap and showing this way a new potential direction for research in knowledge management systems – the correlation between vulnerabilities and risks within knowledge management systems.