During December 2025, a625846910@163.com focused on backend security for the apache/answer repository, addressing a critical bug in the answer acceptance workflow. They enhanced the AcceptAnswer method by implementing server-side validation to ensure that only answers associated with the current question could be marked as the best answer, mitigating the risk of cross-question privilege escalation. Using Go and applying security best practices in API development, they introduced a verification step comparing acceptedAnswerInfo.QuestionID with req.QuestionID. This update improved data integrity and auditability, establishing a single validation path and making the answer acceptance process more robust and maintainable for future development.