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 認証なしRCE CVE-2026-70553のProof-of-Concept: インストールエンドポイントを介してdatabase.phpに持続的なPHPコードインジェクションを行う、MaxSite CMSにおける認証なしリモートコード実行。 免責事項 このPoCは教育および許可されたセキュリティ研究目的のみ を意図しています。著者は、このコードによって引き起こされる誤用や損害について一切責任を負いません。所有するシステム、または明示的な書面による許可を得たシステムに対してのみテストしてください。 脆弱性の概要 MaxSite...

CVE-2026-3395-Lab

CVE-2026-3395 — MaxSite CMS 未認証RCEラボ このリポジトリは教育および研究目的のみで使用してください。 すべてのテストはローカルのDockerラボ環境で行う必要があります。 このセットアップを公開システムや本番システムにデプロイしないでください。 概要 CVE-2026-3395はMaxSite CMSに影響し、管理用AJAXエンドポイントへの未認証アクセスを許可します。runphpプラグインが有効な場合、CMSのフックシステムを通じてユーザー入力をPHPコードとして評価でき、リモートコード実行（RCE）につながる可能性があります。...

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

CVE‑2026‑3395 — MaxSite CMS 認証なしリモートコード実行 概要...

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-2026-87928

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-2026-87929

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 ...

CVE-2026-87929 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 cisession cookie with administrator...

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...

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...

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-2026-87929 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 cisession cookie with administrator...

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...

CVE-2026-87928 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 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-2026-75110

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...

CVE-2026-87928 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 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...