This book constitutes the refereed post-conference proceedings of the 8th EAI International Conference on Innovations and Interdisciplinary Solutions for Underserved Areas, InterSol 2025, held in Ouagadougou , Burkina Faso , during July 3&4, 2025. The 19 full papers and 3 short papers included in this book were carefully reviewed and selected from 110 submissions.They were organized in topical sections as follows: Artificial Intelligence and Applications; Networks, Security, Blockchain and Applications; Information and Communication Technology; and Short Papers.