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Product · MaxSite

MaxSite CMS

7 known vulnerabilities.

MaxSite CMS at a glance

Last 12 months
7
Critical · all time
4
Exploited · all time
0
Public exploit · all time
1
New vulnerabilities per month · last 12 months
0 3 5 December 2025: 0 vulnerabilities Dec 2025 January 2026: 0 vulnerabilities February 2026: 0 vulnerabilities March 2026: 0 vulnerabilities Mar April 2026: 0 vulnerabilities May 2026: 0 vulnerabilities June 2026: 0 vulnerabilities Jun July 2026: 0 vulnerabilities August 2026: 3 vulnerabilities, 3 critical September 2026: 4 vulnerabilities, 1 critical Sep October 2026: 0 vulnerabilities November 2026: 0 vulnerabilities
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7 results · Feed

  • High 8.1
    CVE-2026-87930 Public exploit

    MaxSite CMS through 109.6 PHP Object Injection via ci_session

    MaxSite CMS through 109.6 passes the ci_session cookie to unserialize() without class restrictions, allowing unauthenticated attackers to inject PHP objects. Attackers can forge valid session cookies using the hardcoded encryption key to trigger magic methods…

  • Critical 9.8

    MaxSite CMS through 109.6 Authentication Bypass via Hardcoded Encryption Key

    MaxSite CMS through 109.6 ships with a hardcoded session encryption key in application/config/config.php that is never changed during installation, allowing unauthenticated attackers to forge administrator session cookies. Attackers can mint a malicious ci_se…

  • Medium 5.4

    MaxSite CMS 0.94 through 109.6 HTML Upload XSS via admin_page

    MaxSite CMS versions 0.94 through 109.6 contain a cross-site scripting vulnerability in the admin_page upload handler that allows any logged-in user to upload HTML files. Attackers can upload HTML containing malicious scripts to the uploads/_pages/ directory,…

  • High 8.2

    MaxSite CMS through 109.6 Local File Inclusion via ajax dispatcher

    MaxSite CMS through 109.6 contains a local file inclusion vulnerability in the ajax and require-maxsite dispatchers that allows unauthenticated attackers to execute privileged handler files by supplying base64-encoded path traversal sequences. Attackers can b…

  • Critical 9.8

    MaxSite CMS Unauthenticated PHP Object Injection via maxsite_comuser Cookie

    MaxSite CMS contains a PHP object injection vulnerability that allows unauthenticated attackers to execute arbitrary code by passing attacker-controlled serialized data in the maxsite_comuser cookie directly to unserialize() without validation or class allowl…

  • Critical 9.8

    MaxSite CMS Unauthenticated RCE via Install Endpoint

    MaxSite CMS contains a remote code execution vulnerability that allows unauthenticated attackers to inject arbitrary PHP code into the application configuration file by submitting crafted POST requests to the install endpoint after installation is complete. A…

  • Critical 9.8

    MaxSite CMS 109.5 Unauthenticated AJAX Dispatcher Bypass via ajax.php

    MaxSite CMS 109.5 and earlier contains an authentication bypass vulnerability in the AJAX dispatcher that allows unauthenticated attackers to access admin-gated endpoints by supplying any X-Requested-With header and requesting a base64-encoded path resolving …