MaxSite CMS <=109.1 - Remote Code Execution

MaxSite CMS through 109.1 allows unauthenticated remote attackers to execute arbitrary code via the MarkItUp editor preview AJAX endpoint, preview-ajax.php. The endpoint insufficiently authenticates the request, failing to ensure the user is logged in, and processes the attacker's input via unsaf...

CVE-2026-70553-PoC

CVE-2026-70553 - MaxSite CMS Unauthenticated RCE Proof-of-Concept for CVE-2026-70553: Unauthenticated Remote Code Execution in MaxSite CMS via persistent PHP code injection into database.php through the install endpoint. Disclaimer This PoC is for educational and authorized security research...

CVE-2026-3395-Lab

CVE-2026-3395 — MaxSite CMS Unauthenticated RCE Lab This repository is for educational and research purposes only. All testing must be done in a local Docker lab environment. Do not deploy this setup to public or production systems. Summary CVE-2026-3395 affects MaxSite CMS and allows...

CVE-2026-3395-MaxSite-CMS-Unauthenticated-RCE

CVE‑2026‑3395 — MaxSite CMS Unauthenticated Remote Code Execution...

CVE-2026-87928

MaxSite CMS versions 0.94 through 109.6 contain a cross-site scripting vulnerability in the adminpage upload handler that allows any logged-in user to upload HTML files. Attackers can upload HTML containing malicious scripts to the uploads/pages/ directory, which executes in visitors' browsers wh...

CVE-2026-87927

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 bypass path validation checks and execu...

CVE-2026-87929

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 cisession cookie with administrator...

CVE-2026-87930

MaxSite CMS through 109.6 passes the cisession 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 and corrupt application state or achieve...

CVE-2026-87930

MaxSite CMS through version 109.6 is affected by a PHP Object Injection vulnerability in the ci_session cookie handling. The Session library passes the cookie value to unserialize() without class restrictions, and a hardcoded encryption key allows unauthenticated attackers to forge valid session ...

EUVD-2026-75111

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 cisession cookie with administrator...

CVE-2026-87929

MaxSite CMS through version 109.6 contains a hardcoded session encryption key in application/config/config.php that is never rotated during installation. Because the key is publicly known, an unauthenticated attacker can compute an HMAC-SHA1 signature to mint a malicious ci_session cookie with ad...

EUVD-2026-75112

MaxSite CMS through 109.6 passes the cisession 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 and corrupt application state or achieve...

CVE-2026-87930 MaxSite CMS through 109.6 PHP Object Injection via ci_session

MaxSite CMS through 109.6 passes the cisession 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 and corrupt application state or achieve...

CVE-2026-87928

MaxSite CMS versions 0.94 through 109.6 contain a stored cross-site scripting vulnerability in the admin_page upload handler . Any logged-in user can upload HTML files to the uploads/_pages/ directory containing malicious scripts that execute in visitors' browsers when accessed, enabling persiste...

EUVD-2026-75110

MaxSite CMS versions 0.94 through 109.6 contain a cross-site scripting vulnerability in the adminpage upload handler that allows any logged-in user to upload HTML files. Attackers can upload HTML containing malicious scripts to the uploads/pages/ directory, which executes in visitors' browsers wh...

EUVD-2026-75109

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 bypass path validation checks and execu...

CVE-2026-87927 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 bypass path validation checks and execu...

CVE-2026-87927

MaxSite CMS through version 109.6 contains a local file inclusion vulnerability in the ajax and require-maxsite dispatchers. By supplying base64-encoded path traversal sequences, unauthenticated attackers bypass path validation checks and execute admin-gated handler actions without authentication...

PT-2026-89109

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 session cookie with administrator...

CVE-2026-70553

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...