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    3 vulnerabilities found for MaxSite CMS by MaxSite

    CVE-2026-70554 (GCVE-0-2026-70554)

    Vulnerability from cvelistv5 – Published: 2026-08-04 20:11 – Updated: 2026-08-05 14:28
    VLAI
    Title
    MaxSite CMS Unauthenticated PHP Object Injection via maxsite_comuser Cookie
    Summary
    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 allowlisting. Attackers can craft a malicious serialized PHP object payload delivered in a single HTTP request to trigger magic methods during object graph reconstruction, enabling property-oriented programming attacks or remote code execution via available gadget chains such as those targeting SoapClient or Imagick extensions.
    Severity
    9.3 (Critical)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    9.8 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-502 - Deserialization of Untrusted Data
    Assigner
    References
    Impacted products
    Vendor Product Version
    MaxSite MaxSite CMS Affected: 0.78 , ≤ 109.5 (custom)
    Unaffected: 109.6 (custom)
    		Create a notification for this product.
    Date Public
    2026-08-04 00:00
    Credits
    Amir Aliu & Enrik Mustafa
    Show details on NVD website
    To clipboard 

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    CVE-2026-70553 (GCVE-0-2026-70553)

    Vulnerability from cvelistv5 – Published: 2026-08-04 19:37 – Updated: 2026-08-05 19:04
    VLAI
    Title
    MaxSite CMS Unauthenticated RCE via Install Endpoint
    Summary
    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. Attackers can supply a malicious db_dbprefix value containing a single quote to break out of a PHP string literal in application/config/database.php, appending attacker-controlled PHP statements that are executed by the web server on every subsequent request, resulting in persistent unauthenticated remote code execution as the web-server process user.
    Severity
    9.3 (Critical)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    9.8 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-94 - Improper Control of Generation of Code ('Code Injection')
    Assigner
    References
    Impacted products
    Vendor Product Version
    MaxSite MaxSite CMS Affected: 105.2 , ≤ 109.5 (custom)
    Unaffected: 109.6 (custom)
    		Create a notification for this product.
    Date Public
    2026-08-04 00:00
    Credits
    Amir Aliu & Enrik Mustafa
    Show details on NVD website
    To clipboard 

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    CVE-2026-70552 (GCVE-0-2026-70552)

    Vulnerability from cvelistv5 – Published: 2026-08-04 19:28 – Updated: 2026-08-05 13:50
    VLAI
    Title
    MaxSite CMS 109.5 Unauthenticated AJAX Dispatcher Bypass via ajax.php
    Summary
    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 to any *-ajax.php file in the codebase. Attackers can exploit this dispatcher bypass to reach privileged plugin endpoints without credentials, enabling actions such as manipulating poll states and vote counts, and amplifying the impact of any dangerous operation performed by admin-only ajax files across the plugin tree.
    Severity
    9.3 (Critical)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
    9.8 (Critical)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
    SSVC
    Exploitation: none Automatable: yes Technical Impact: total
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-306 - Missing Authentication for Critical Function
    Assigner
    References
    Impacted products
    Vendor Product Version
    MaxSite MaxSite CMS Affected: 0.78 , ≤ 109.5 (custom)
    Unaffected: 109.6 (custom)
    		Create a notification for this product.
    Date Public
    2026-08-04 00:00
    Credits
    Amir Aliu & Enrik Mustafa
    Show details on NVD website
    To clipboard 

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