Worked on the nextcloud/maps repository to address a defect affecting public map usability. Focused on backend development and security, the developer resolved an issue where map tiles failed to load on public-facing pages by updating the Content Security Policy. This involved modifying the CSP to explicitly allow resources from https://tile.openstreetmap.org, ensuring that external map tiles could be securely integrated without compromising site security. The solution targeted the PublicFavoritePageController, restoring reliable map rendering for public users. Utilizing PHP and applying expertise in security best practices, the developer improved both the reliability and maintainability of public map features through precise policy adjustments.