CVE-2025-11417: Campcodes Voting System RCE Vulnerability

CVE-2025-11417 Overview

CVE-2025-11417 is an unrestricted file upload weakness in Campcodes Advanced Online Voting Management System 1.0. The flaw resides in /admin/voters_add.php, where the photo parameter accepts attacker-controlled file content without adequate validation. An authenticated user with low privileges can submit a crafted request over the network to upload arbitrary files. Public proof-of-concept details have been disclosed, increasing the risk of opportunistic exploitation. The issue is classified under [CWE-284] Improper Access Control and aligns with broader unrestricted upload patterns affecting confidentiality, integrity, and availability of the application.

Critical Impact
Authenticated attackers can upload arbitrary files through the photo parameter in voters_add.php, potentially leading to web-accessible payload placement on the server.

Affected Products

Campcodes Advanced Online Voting Management System 1.0
CPE: cpe:2.3:a:campcodes:advanced_online_voting_system:1.0:*:*:*:*:*:*:*
Vendor: Campcodes

Discovery Timeline

2025-10-08 - CVE-2025-11417 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-11417

Vulnerability Analysis

The vulnerability exists in the administrative voter creation workflow exposed by /admin/voters_add.php. The endpoint processes a multipart form submission that includes a photo file field intended for voter identification images. The application fails to enforce server-side restrictions on file type, extension, MIME type, or content. As a result, an attacker can substitute the expected image with an arbitrary file and have it written to a server-accessible path.

Because the affected component is reachable over the network and requires only low-privileged authentication, the attack surface is broad in environments where administrative or staff accounts exist. The exploit details have been made publicly available, lowering the barrier to weaponization. The issue maps to [CWE-284] Improper Access Control, reflecting the application's failure to constrain who can perform uploads and what content is acceptable.

Root Cause

The root cause is missing or insufficient validation of the photo argument in voters_add.php. The handler does not enforce an allowlist of permitted extensions, validate MIME types against actual file contents, or sanitize uploaded filenames. Combined with permissive write locations, this allows an authenticated user to place files outside the intended scope of "voter photo" data.

Attack Vector

The attack vector is network-based through the application's administrative HTTP interface. An attacker with low-privileged credentials submits a forged multipart POST request to /admin/voters_add.php with the photo field containing arbitrary file content. Successful exploitation results in placement of attacker-supplied content on the server file system, which can be retrieved or executed depending on the runtime configuration of the hosting environment.

No verified exploit code is reproduced here. Refer to the GitHub Issue Discussion and the VulDB CTI Report #327353 for technical references.

Detection Methods for CVE-2025-11417

Indicators of Compromise

POST requests to /admin/voters_add.php containing photo fields with non-image extensions such as .php, .phtml, .jsp, or .aspx.
Newly written files in the application's upload directory with executable server-side extensions or mismatched MIME signatures.
Subsequent GET requests fetching recently uploaded files from upload paths shortly after a voter-add operation.

Detection Strategies

Inspect web server access logs for sequences of voters_add.php POSTs followed by direct requests to uploaded artifacts.
Use file integrity monitoring on upload directories to flag creation of files with non-image content or scripting extensions.
Apply web application firewall rules that validate Content-Type and file signature for multipart uploads targeting the voter management endpoints.

Monitoring Recommendations

Forward web server, application, and file system audit logs to a centralized analytics platform for correlation across upload, access, and execution events.
Alert on administrative authentication anomalies, including new low-privileged sessions performing rapid voter creation actions.
Track outbound connections originating from the web server process, which may indicate post-upload code execution.

How to Mitigate CVE-2025-11417

Immediate Actions Required

Restrict access to /admin/ paths via network controls or authentication proxies until a vendor fix is available.
Disable or remove the voter photo upload functionality if it is not operationally required.
Rotate credentials for all administrative and staff accounts that can reach voters_add.php.
Audit upload directories for unexpected files and remove any unauthorized content.

Patch Information

No vendor advisory or official patch has been published in the references associated with CVE-2025-11417. Consult the Campcodes website and the VulDB entry #327353 for status updates. Until a fix is released, treat the application as exposed and apply compensating controls.

Workarounds

Configure the web server to deny script execution within upload directories using handler restrictions or .htaccess controls.
Implement a server-side allowlist that validates file extensions, MIME types, and magic bytes for the photo parameter.
Rename uploaded files to non-executable randomized names and store them outside the web root where feasible.
Place the application behind a web application firewall with rules that block multipart uploads containing server-side scripting content.

bash

# Example Apache configuration to disable script execution in upload directory
<Directory "/var/www/voting/admin/uploads">
    php_admin_flag engine off
    SetHandler default-handler
    Options -ExecCGI
    AddType text/plain .php .phtml .php3 .php4 .php5 .php7 .phar
</Directory>