CVE-2026-19264
CriticalCVSS 9.8Summary
Postiz, an open-source social media scheduling tool, has a path traversal vulnerability in the route serving locally stored media. The route requires no authentication and does not normalize paths, allowing an unauthenticated attacker to read any file readable by the process, including environment variables with JWT secrets and database credentials.
Risk Assessment
An attacker can access sensitive data, including JWT secrets, enabling session forgery and full application compromise.
Recommendation
Upgrade Postiz to the latest fixed version and restrict access to the application.
Original NVD description (English source)
Postiz is an open-source social media scheduling tool. The route that serves locally stored media joins URL-supplied path segments onto the upload directory and streams the file without normalising the path or confining it to that directory, and the route requires no authentication. Raw dot-segments are collapsed before routing, but URL-encoded separators survive route matching and are decoded only once they reach the handler, restoring the traversal at the filesystem call. An unauthenticated remote attacker can therefore read any file readable by the application process, including the process environment, which exposes the JWT signing secret, the database connection string, and connected provider and billing secrets. Because session tokens are signed with that secret and carry no expiry, this allows forging a non-expiring session as any user, including an administrator, without a password.