Yourls

Yourls is a self-hosted URL shortening application that, despite a narrow product scope, occupies a prominent position among lightweight web-based utilities and recurs across diverse deployment contexts. Vulnerabilities affecting the vendor skew toward serious outcomes and frequently acquire public exploit code; the exposure centers on web application fundamentals including cross-site scripting, cross-site request forgery, type confusion, and information disclosure, reflecting the complexity of input handling and session management in URL-processing logic. Defenders should treat Yourls instances, particularly internet-facing or multi-user deployments, as requiring prompt patching; live severity, exploitation, and exposure counts are shown alongside this summary.