CVE-2026-4562 in MacCMS
Summary
by MITRE • 03/23/2026
A security flaw has been discovered in MacCMS 2025.1000.4052. This affects an unknown part of the file application/api/controller/Timming.php of the component Timming API Endpoint. The manipulation results in missing authentication. The attack may be performed from remote. The exploit has been released to the public and may be used for attacks.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 05/11/2026
This vulnerability in MacCMS 2025.1000.4052 represents a critical authentication bypass flaw within the Timming API Endpoint component located in the application/api/controller/Timming.php file. The weakness stems from inadequate access control mechanisms that fail to properly validate user credentials or session tokens before granting access to sensitive functionality. This type of vulnerability falls under CWE-285, which specifically addresses improper authorization issues in software systems. The absence of proper authentication checks creates an exploitable pathway where unauthorized parties can gain access to restricted resources without providing valid credentials.
The technical implementation of this flaw suggests that the Timming.php controller lacks essential authentication middleware or validation routines that should normally be enforced before processing API requests. Attackers can exploit this vulnerability remotely, eliminating the need for physical access or local network presence. This remote exploit capability significantly increases the attack surface and potential impact, as threat actors can target the vulnerable system from anywhere on the internet. The public release of exploit code further amplifies the risk, as it provides readily available tools for malicious actors to leverage this weakness without requiring advanced technical skills.
From an operational perspective, this vulnerability poses severe risks to organizations using the affected MacCMS version, as it allows unauthorized access to potentially sensitive data and system functionality. The impact extends beyond simple data theft to include potential system compromise, data manipulation, and service disruption. The vulnerability's classification as a remote attack vector means that organizations cannot rely on network segmentation or local access controls to protect against exploitation. Security teams must consider the implications of this flaw across their entire attack surface, as it could enable more sophisticated attacks such as privilege escalation or lateral movement within compromised networks.
Mitigation strategies should focus on immediate patching of the vulnerable MacCMS version to address the authentication bypass issue. Organizations should implement network-level protections including firewall rules that restrict access to API endpoints and consider deploying intrusion detection systems to monitor for exploitation attempts. The implementation of additional authentication layers such as API keys, rate limiting, and request validation can provide defense-in-depth measures. Security professionals should also conduct comprehensive vulnerability assessments to identify other potential weaknesses in the application's authentication framework and ensure that all API endpoints properly enforce access controls. This vulnerability highlights the importance of regular security updates and the need for robust authentication mechanisms in web applications, aligning with ATT&CK technique T1078 for valid accounts and T1190 for exploit public-facing applications.