QuickJot is a minimalist Android notes app. To power its home-screen widget, the app exposes notes through a ContentProvider that a small companion widget process reads from. The team wanted the widget to support flexible filtering and column selection so the UI could be customised. Review the provider that backs content://com.quickjot.provider/notes and decide whether sharing notes this way is safe.

CivicLookup is an internal portal that lets municipal staff search citizen records. Authentication is still backed by a legacy directory that was exported from the old HR system as a flat XML file, and staff sign in against it using lxml's XPath engine. Review the authentication flow and figure out whether the login query can be trusted with whatever a user types into the form.

LeadLodge is a CRM where sales reps capture leads from a public "contact us" form and later export their contact lists to CSV so they can crunch numbers in Excel or Google Sheets. Fields like name, company and notes are filled in by whoever submits the form, then written out at export time. Take a look at how the export is built and decide whether opening that file is as safe as the team assumes.

TuneCrate is a music-library backend built in Go using gqlgen on top of PostgreSQL. Users browse and filter a catalog of tracks through the discovery page, which calls the searchTracks(genre, sort) GraphQL query. The filtering resolver was written quickly to support flexible genre and sort options. Review the resolvers backing the catalog and see whether any client-supplied input reaches the database in a way it shouldn't.

PaperTrail is a collaborative documents app where users create short 'share' links to send docs to teammates. After a link is created, the server bounces the visitor to the right document and drops a small tracking cookie so analytics can attribute the visit. The redirect target and the tracking value both come from the request. Review the share-link flow and decide whether the way these values reach the HTTP response is safe.

Review code for UserCore, an enterprise identity management system handling authentication for a SaaS platform with over 50,000 users. The password reset flow was recently refactored to improve performance by replacing an ORM with direct SQL queries. Examine how password reset tokens are validated to ensure the implementation is secure against common attack vectors.

Review the backend code for EventSphere, a popular online ticketing platform built in Go. The platform handles thousands of ticket reservations daily for concerts, sports events, and theater shows. A recent penetration test flagged potential issues in the reservation system. Examine how user inputs are processed when booking seats to ensure database operations are secure.

DungeonDesk is an online tabletop RPG platform where game masters can host virtual sessions. The PHP admin panel allows GMs to configure session settings like dice modes, player limits, and logging preferences. A recent security audit flagged the session configuration module for review. Examine how user input is processed and how configuration variables are initialized.

Review the AWS Lambda backend for UrCar, a ride-sharing platform that handles millions of trips daily. The admin analytics team recently deployed a serverless endpoint to query trips by city for business intelligence dashboards. This Lambda function connects to a legacy PostgreSQL database that stores trip history. Focus on how user input is processed in the admin endpoints and database interactions.

GridWatch is a national power grid maintenance platform used by engineers across multiple regions to manage substation configurations. The Laravel-based API allows authorized personnel to update substation identifiers, which must remain unique across all regions to prevent routing conflicts. Review the station update functionality and examine how the validation rules handle uniqueness constraints during updates.

GateSure is a border control biometric verification system deployed at international checkpoints. The system receives XML payloads containing fingerprint metadata from scanning kiosks distributed across entry points. Your task is to review the XML processing pipeline that handles incoming biometric data submissions. Pay close attention to how external data is parsed and processed by the verification backend.