PHP developers often miss critical security updates until it's too late. A focused monitoring service could watch for new CVEs across all major PHP versions and popular frameworks.
The tool would provide immediate alerts via preferred channels (email, Slack, etc.) with clear patching instructions. Hosting providers might pay to white-label it for their customers.
Start by monitoring just the core PHP security mailing lists and common framework trackers. Expand to vulnerability scanning later.
The risk is that many developers already rely on general security bulletins, making differentiation challenging.