CVE-2026-3395: MaxSite CMS MarkItUp Preview AJAX Endpoint preview-ajax.php eval code injection
A flaw has been found in MaxSite CMS up to 109.1. This impacts the function eval of the file application/maxsite/admin/plugins/editormarkitup/preview-ajax.php of the component MarkItUp Preview AJAX Endpoint. Executing a manipulation can lead to code injection. It is possible to launch the attack remotely. The exploit has been published and may be used. Upgrading to version 109.2 will fix this issue. This patch is called 08937a3c5d672a242d68f53e9fccf8a748820ef3. You should upgrade the affected component. The code maintainer was informed beforehand about the issues. He reacted very fast and highly professional.
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Frequently Asked Questions
What is the severity of CVE-2026-3395?
CVE-2026-3395 has a high severity due to the potential for remote code execution through eval injection.
How do I fix CVE-2026-3395?
To fix CVE-2026-3395, update your MaxSite CMS to version 109.2 or later.
What versions of MaxSite CMS are affected by CVE-2026-3395?
CVE-2026-3395 affects MaxSite CMS versions up to and including 109.1.
What is the nature of the vulnerability CVE-2026-3395?
CVE-2026-3395 is an eval code injection vulnerability in the MarkItUp Preview AJAX Endpoint.
Can CVE-2026-3395 be exploited remotely?
Yes, CVE-2026-3395 can be exploited remotely without requiring authentication.