CVE-2026-33067: SiYuan has Stored XSS to RCE via Unsanitized Bazaar Package Metadata

SiYuan’s Bazaar (community marketplace) renders package metadata fields (displayName, description) using template literals without HTML escaping. A malicious package author can inject arbitrary HTML/JavaScript into these fields, which executes automatically when any user browses the Bazaar page. Because SiYuan’s Electron configuration enables nodeIntegration: true with contextIsolation: false, this XSS escalates directly to full Remote Code Execution on the victim’s operating system — with zero user interaction beyond opening the marketplace tab.