A User enumeration vulnerability in AquilaCMS 1.409.20 and prior allows unauthenticated attackers to obtain email addresses via the Add a user feature. The vulnerability occurs due to insufficiently validated user input being processed as a regular expression, which is then matched against email addresses to find duplicate entries.
Weakness
During installation, installed file permissions are set to allow anyone to modify those files.
Potential Mitigations
- Compartmentalize the system to have “safe” areas where trust boundaries can be unambiguously drawn. Do not allow sensitive data to go outside of the trust boundary and always be careful when interfacing with a compartment outside of the safe area.
- Ensure that appropriate compartmentalization is built into the system design, and the compartmentalization allows for and reinforces privilege separation functionality. Architects and designers should rely on the principle of least privilege to decide the appropriate time to use privileges and the time to drop privileges.
References