CVE-2026-3395 Details
Description
A flaw has been found in MaxSite CMS up to 109.1. This impacts the function eval of the file application/maxsite/admin/plugins/editor_markitup/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.
A code injection vulnerability has been identified in MaxSite CMS versions through 109.1. The issue arises in the MarkItUp Preview AJAX Endpoint, specifically within the 'eval' function of 'application/maxsite/admin/plugins/editor_markitup/preview-ajax.php'. This vulnerability allows for remote code execution, as the endpoint processes user-supplied data without proper authentication or validation, enabling the execution of arbitrary PHP code on the server.
Users are advised to upgrade to MaxSite CMS version 109.2, which addresses this vulnerability. The patch is available on the MaxSite CMS GitHub repository.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 2, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/maxsite/cms/ | [email protected] | Product |
| https://github.com/maxsite/cms/commit/08937a3c5d672a242d68f53e9fccf8a748820ef3 | [email protected] | Patch |
| https://vuldb.com/?ctiid.348281 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.348281 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.762169 | [email protected] | Third Party AdvisoryVDB Entry |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-94 | Improper Control of Generation of Code ('Code Injection') | [email protected] |
| CWE-74 | Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') | [email protected] |
| CWE-94 | Improper Control of Generation of Code ('Code Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| max-3000 maxsite cms | < 109.2 |
CPE
Remediation
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Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 29, 2026 | Data Remediation | [email protected] |
| Mar 5, 2026 | Initial Analysis | [email protected] |
| Mar 1, 2026 | New CVE Received | [email protected] |