The State of Open Source Security report highlights several concerning trends in open source security, including a significant spike in ReDoS vulnerabilities in npm packages by 143% in 2018, and an increase in XSS vulnerabilities across various ecosystems. The report also notes that 78% of vulnerabilities are found in indirect dependencies, making remediation complex. Additionally, it reveals that malicious packages were downloaded over 8 million times in 2018, with sophisticated attacks targeting the npm ecosystem, including typosquatting, compromised maintainer accounts, and socially engineered inclusion of malicious packages. The report emphasizes the need for developers to own security and highlights the importance of skills training for open source maintainers.