Invoiceplane

Invoiceplane is a self-hosted open-source invoicing and billing application that, despite a narrow product scope, occupies a position among more prominent vendors in the vulnerability landscape, likely reflecting its adoption across small and mid-sized business operations. Vulnerabilities affecting the vendor skew toward serious outcomes, with an elevated share reaching critical severity. The exposure recurs consistently through a set of characteristic application-layer weaknesses: cross-site scripting in dynamic content generation, unrestricted file uploads, path traversal in directory access, authorization bypass through user-controlled keys, and improper disclosure of files and directories—each typical of web application frameworks where input validation, file handling, and access control are not uniformly hardened across the codebase. Defenders deploying this software should prioritize patching releases addressing these classes and restrict network exposure where feasible. Current exploitation activity and exposure counts are shown alongside this summary.