CVE-2026-75465: High severity maccms MCMS vulnerability
The /api.php/user/getlist endpoint in Maccms v10 v2026.1000.4055 is vulnerable to an Incorrect Access Control issue. The interface fails to perform any authentication or authorization checks. An unauthenticated remote attacker can send a crafted HTTP GET request with limit and offset parameters to paginate and retrieve sensitive information of all registered users.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
Any remote, unauthenticated attacker who can reach the affected Maccms endpoint can exploit it. No valid user account or administrative privileges are required.
What information can an attacker obtain?
An attacker can retrieve sensitive information for registered users through the user-list API endpoint. The limit and offset parameters can be used to paginate through the full user population.
How can I check whether my deployment is exposed?
Determine whether the affected Maccms version v2026.1000.4055 is deployed and whether /api.php/user/get_list is reachable remotely. A response to an unauthenticated GET request using limit and offset parameters indicates that the endpoint is accessible without authentication or authorization checks.