CVE-2026-3395 - MaxSite CMS MarkItUp Preview AJAX Endpoint preview-ajax.php eval code injection

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MEDIUM

MaxSite CMS MarkItUp Preview AJAX Endpoint preview-ajax.php eval code injection

Published Mar 1, 2026

6.9

MEDIUM

CVSS 4.0

EPSS 2.47%

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.

Affected products

Vendor MaxSite Product CMS Default
n/a
- Version
  109.0
  Status
  affected
  Constraints
  -
- Version
  109.1
  Status
  affected
  Constraints
  -
- Version
  109.2
  Status
  unaffected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

MaxSite

CMS

n/a

Version	Status	Constraints
109.0	affected	-
109.1	affected	-
109.2	unaffected	-

Remediation

No remediation recorded yet.

Weaknesses (2)

CWE-74

CWE-94

Code Injection

References (6)

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-9130
Advisory
https://github.com/maxsite/cms/
product
https://github.com/maxsite/cms/commit/08937a3c5d672a242d68f53e9fccf8a748820ef3
patch
https://vuldb.com/?ctiid.348281
signaturepermissions-requiredPermissions RequiredVDB Entry
https://vuldb.com/?id.348281
vdb-entrytechnical-descriptionThird Party AdvisoryVDB Entry
https://vuldb.com/?submit.762169
third-party-advisoryThird Party AdvisoryVDB Entry

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-9130		Advisory
https://github.com/maxsite/cms/		product
https://github.com/maxsite/cms/commit/08937a3c5d672a242d68f53e9fccf8a748820ef3		patch
https://vuldb.com/?ctiid.348281		signaturepermissions-requiredPermissions RequiredVDB Entry
https://vuldb.com/?id.348281		vdb-entrytechnical-descriptionThird Party AdvisoryVDB Entry
https://vuldb.com/?submit.762169		third-party-advisoryThird Party AdvisoryVDB Entry