CVE-2026-15516 MacCMS CVE debrief

Who should care

Users of MacCMS Pro up to version 2022.1000.3005 should be aware of this vulnerability and take necessary actions to upgrade to a secure version. This includes reviewing and monitoring Installation Module usage and access controls, implementing compensating controls to detect and prevent exploitation attempts, and ensuring asset inventory and source tracking are in place to manage the vulnerability.

Technical summary

The vulnerability is located in the Installation Module of MacCMS Pro, specifically in the step5 function of the Index.php file. This allows for authorization bypass, which can be exploited remotely with a high level of complexity. The CVSS score is 2.9, indicating a low severity. Upgrading to version 2022.1000.3025 is recommended to address this issue. The exploit is now public and may be used. Users should be aware of the potential risks and take necessary precautions.

Defensive priority

Low priority due to low CVSS score and high complexity of exploitation. However, users of MacCMS Pro should be aware of this vulnerability and take necessary actions to upgrade to a secure version. Compensating controls should be implemented to detect and prevent exploitation attempts. Monitoring and review of Installation Module usage and access controls are recommended. Asset inventory and source tracking are also suggested to ensure the vulnerability is properly managed. Review relevant monitoring, detection, and logs for exposed assets that need extra review. Track exceptions, retest remediated assets, and close the item only after evidence is documented. Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up. Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed. Check if rollback or change windows are necessary for remediation. Implement compensating controls for exposed systems while remediation is scheduled and verified. Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. The NVD entry is currently in the 'Received' status, and the CVE record has not been modified since its publication on 2026-07-13T01:17:04.753Z. The vulnerability allows for authorization bypass, which can be exploited remotely with a high level of complexity. The CVSS score is 2.9, indicating a low severity. Upgrading to version 2022.1000.3025 is recommended to address this issue. The exploit is now public and may be used. Users should be aware of the potential risks and take necessary precautions. The vulnerability is located in the Installation Module of MacCMS Pro, specifically in the step5 function of the Index.php file. This allows for authorization bypass, which can be exploited remotely with a high level of complexity. The attack requires a high level of complexity and is considered difficult to exploit. The exploitability is considered difficult. The vulnerability has a low CVSS score, but users should still be aware of the potential risks and take necessary precautions. The NVD entry is currently in the 'Received' Up

Recommended defensive actions

• Upgrade MacCMS Pro to version 2022.1000.3025 or later
• Review and monitor Installation Module usage and access controls
• Implement compensating controls to detect and prevent exploitation attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record was published on 2026-07-13T01:17:04.753Z and has not been modified since then. The NVD entry is currently in the 'Received' status. The vulnerability was detected in MacCMS Pro up to 2022.1000.3005. The function step5 of the file application/install/controller/Index.php of the component Installation Module is impacted, leading to authorization bypass. The attack may be launched remotely with high complexity and is considered difficult to exploit. Upgrading to version 2022.1000.3025 is recommended. Evidence limits suggest verifying the installation module usage and access controls.

Official resources