The purpose of this article is to present the results of the study on the specific aspects of cyberbullying and prevention measures viewed from both the students’ and teachers’ perspectives. Cyberbullying is a severe threat to the individual and social well-being of young people. For this reason, it is important to understand how they perceive the phenomenon of cyberbullying, how they identify its causes, what they think about support, and the preventive measures offered through the lens of their own cyberbullying experiences. The study was conducted in a qualitative research paradigm. Students (N = 55) aged 13–16 from 25 junior high schools located in different regions of (blinded for the review) who had experienced cyberbullying incidents as victims, perpetrators, or bystanders, and their teachers (N = 45) were interviewed. They provided in-depth answers regarding cyberbullying incidents they had experienced and presented their attitudes and interpretations concerning those cases. The raw data were analysed by competent judges who defined a posteriori important categories that were useful for understanding the psychosocial mechanisms of cyberbullying and important dimensions of its prevention. The results proved a clear connection between participation in offline and online peer violence. The analysis of the statements showed that public/private types of cyberbullying involve different psychological and social mechanisms. Our findings confirm the importance of empathy as the buffering factor in cyberbullying perpetration. In addition, the limitations and inadequacy of the support and interventions offered by adults in cyberbullying cases have been emphasised in teens’ testimonies. The results may constitute grounds for formulating recommendations on the prevention of cyberbullying in the school context, taking into account the perspective of all actors involved.