CVE-2026-111053: FOSSBilling >= 0.1.0, < 0.8.7

Affected technology

FOSSBilling · >= 0.1.0, < 0.8.7
FOSSBilling

Component: Not specified by the source
File: parameter

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

An attacker can submit traversal sequences in the file parameter and observe the returned boolean to determine whether arbitrary files or directories exist on the server. Vendor/CNA’s CVSS 4.0 assessment (base score 6.9/10) rates confidentiality impact as low; integrity and availability impact as none.