Security evaluation of the Matrix Server-Server API

Sammanfattning: This thesis presents a comprehensive security analysis of the Server-Server API of the Matrix protocol, providing a detailed examination of its vulnerabilities and contributing a significant body of knowledge to the cybersecurity field. The research focused exclusively on the Server-Server API of the Matrix protocol. Despite the testing of 2 vulnerabilities that did not succeed, the primary contribution of this work lies in the in-depth threat analysis and the identification of 16 critical, yet untested, vulnerabilities that may be probed in future research. The findings reveal that the Matrix protocol’s Server-Server API currently maintains a competent level of security. However, the uncovered vulnerabilities highlight the necessity for continuous and proactive security measures within its ongoing development. The practical implications of the identified vulnerabilities are substantial, with relevance extending to similar APIs in the broader digital communication landscape. The rigorous penetration testing methodology following rigorous standards, coupled with systematic documentation, ensures a trustworthy basis for the study’s conclusions. In essence, this thesis does not only answer the research question by identifying and documenting current security weaknesses within the Server-Server API but also establishes a methodological foundation for future security enhancement initiatives. By doing so, it adds valuable insights to the cybersecurity community, with implications for developers, researchers, and users alike, emphasizing the need for a persistent and vigilant approach to API security in the evolving digital era