CSRF Ignored Enables Persistent Remote Code Execution in CMSimple 5.24

CMSimple 5.24 ships with CSRF protection disabled by default, which turns csrfProtection() into a no-op on every state-changing admin request, and it does not send the csrf_token hidden field in admin forms. Because administrator authentication is cookie-only and no CSRF token is enforced, an unauthenticated attacker can induce a logged-in administrator's browser to issue a forged content-save request with a text payload containing a scripting marker. The marker is stored verbatim into content/content.php; on every subsequent page view evaluate_cmsimple_scripting() (functions.php) executes the marker body with PHP eval() — for all visitors, including unauthenticated ones. This yields persistent remote code execution on the web server.

Directory traversal vulnerability in cmsimple/cms.php in CMSimple 3.1, when register_globals is enabled, allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the sl parameter to index.php. NOTE: this can be leveraged for remote file execution by including adm.php and then invoking the upload action. NOTE: on 20080601, the vendor patched 3.1 without changing the version number.

CMSimple 5.15 Remote Command Execution via Extensions Configuration

CMSimple 5.15 contains a remote command execution vulnerability that allows authenticated attackers to modify file extensions and upload malicious PHP files. Attackers can append ',php' to Extensions_userfiles and upload a shell script to the media directory to execute arbitrary code on the server.

CMSimple 5.4 Cross-Site Scripting via HTML Unicode Encoding

CMSimple 5.4 contains a cross-site scripting vulnerability that allows attackers to bypass input filtering by using HTML to Unicode encoding. Attackers can inject malicious scripts by encoding payloads like ')-alert(1)// and execute arbitrary JavaScript when victims interact with delete buttons.

CMSimple 5.2 Stored Cross-Site Scripting via Filebrowser External Input

CMSimple 5.2 contains a stored cross-site scripting vulnerability in the Filebrowser External input field that allows attackers to inject malicious JavaScript. Attackers can place unfiltered JavaScript code that executes when users click on Page or Files tabs, enabling persistent script injection.

CMSimple 5.4 Authenticated Local File Inclusion Remote Code Execution

CMSimple 5.4 contains an authenticated local file inclusion vulnerability that allows remote attackers to manipulate PHP session files and execute arbitrary code. Attackers can leverage the vulnerability by changing the functions file path and uploading malicious PHP code through session file upload mechanisms.

CMSimple 5.4 Authenticated Remote Code Execution via Template Editing

CMSimple 5.4 contains an authenticated remote code execution vulnerability that allows logged-in attackers to inject malicious PHP code into template files. Attackers can exploit the template editing functionality by crafting a reverse shell payload and saving it through the template editing endpoint with a valid CSRF token.

An issue in CMSimple v.5.16 allows a remote attacker to obtain sensitive information via a crafted script to the validate link function.

Cross-Site Scripting (XSS) vulnerability in the Settings menu of CMSimple v5.15 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Logout parameter under the Language section.

A cross-site scripting (XSS) vulnerability in the Settings menu of CMSimple v5.15 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Downloads parameter under the Language section.

Cross Site Scripting vulnerability in CmSimple v.5.15 allows a remote attacker to execute arbitrary code via the functions.php component.

Cross-site scripting (XSS) vulnerability in whizzywig/wb.php in CMSimple Classic 3.54 and earlier, possibly as downloaded before February 26, 2014, allows remote attackers to inject arbitrary web script or HTML via the d parameter.

Insecure Permissions vulnerability in CMSimple v.5.16 allows a remote attacker to obtain sensitive information via a crafted script to the Functionality of downloading php backup files.

CMSimple 5.16 allows the user to edit log.php file via print page.

CMSimple 5.16 allows the user to read cms source code through manipulation of the file name in the file parameter of a GET request.

A cross-site scripting (XSS) vulnerability in the Settings menu of CMSimple v5.15 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Edit parameter under the Language section.

A cross-site scripting (XSS) vulnerability in the Settings menu of CMSimple v5.15 allows attackers to execute arbitrary web scripts or HTML via a crafted payload injected into the Configuration parameter under the Language section.

CMSimple 5.4 is vulnerable to Cross Site Scripting (XSS) via the file upload feature.

CMSimple 5.4 is vulnerable to Directory Traversal. The vulnerability exists when a user changes the file name to malicious file on config.php leading to remote code execution.

CMSimple 4.7.5 has XSS via an admin's upload of an SVG file at a ?userfiles&subdir=userfiles/images/flags/ URI.