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.
Exploits (3)
github
WORKING POC
10 stars
by XiaomingX · pythonpoc
https://github.com/XiaomingX/data-cve-poc-py-v1/tree/main/2026/CVE-2026-3395
nomisec
WORKING POC
by rootdirective-sec · poc
https://github.com/rootdirective-sec/CVE-2026-3395-Lab
nomisec
WORKING POC
by mbanyamer · poc
https://github.com/mbanyamer/CVE-2026-3395-MaxSite-CMS-Unauthenticated-RCE
References (5)
Scores
CVSS v3
7.3
EPSS
0.0005
EPSS Percentile
16.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Lab Environment
Details
CWE
CWE-94
CWE-74
Status
published
Products (1)
max-3000/maxsite_cms
< 109.2
Published
Mar 01, 2026
Tracked Since
Mar 01, 2026