IDURAR is open source ERP CRM accounting invoicing software. The vulnerability exists in the corePublicRouter.js file. Using the reference usage here, it is identified that the public endpoint is accessible to an unauthenticated user. The user's input is directly appended to the join statement without additional checks. This allows an attacker to send URL encoded malicious payload. The directory structure can be escaped to read system files by adding an encoded string (payload) at subpath location.
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.