CVE-2026-93975: Assessment Management 1.0 XSS Vulnerability

CVE-2026-93975 Overview

CVE-2026-93975 is a cross-site scripting (XSS) vulnerability in code-projects Assessment Management 1.0. The flaw resides in the admin/edit-user.php file, part of the User Editing component. Attackers can manipulate the name, sname, email, username, password, or id parameters to inject arbitrary script content that executes in the context of other users' browsers. The exploit has been publicly disclosed, though exploitation requires high privileges and user interaction. This weakness maps to CWE-79: Improper Neutralization of Input During Web Page Generation.

Critical Impact
An authenticated administrator can inject persistent JavaScript payloads through the user editing form, enabling session theft, credential harvesting, or unauthorized actions against other administrators viewing the affected records.

Affected Products

code-projects Assessment Management 1.0
admin/edit-user.php script — User Editing component
Deployments exposing the administrative interface over the network

Discovery Timeline

2026-09-20 - CVE-2026-93975 published to the National Vulnerability Database
2026-09-21 - Last updated in NVD database

Technical Details for CVE-2026-93975

Vulnerability Analysis

The vulnerability exists in the user editing workflow of Assessment Management 1.0. When an administrator submits changes through admin/edit-user.php, the application accepts values for name, sname, email, username, password, and id without adequate sanitization or output encoding. The stored values are later rendered back into HTML responses, allowing injected script tags or event handlers to execute in the browser of any user rendering the affected view. Because the payload persists in application state, the impact extends beyond the attacker's session to any subsequent viewer.

Root Cause

The root cause is missing input validation and output encoding on user-controlled parameters passed to admin/edit-user.php. The application trusts administrator-supplied data and echoes it into HTML contexts without applying HTML entity encoding or a context-aware sanitization routine. This matches the classic pattern described in CWE-79.

Attack Vector

An authenticated user with administrative privileges submits a crafted request to admin/edit-user.php containing HTML or JavaScript in one of the six vulnerable fields. The payload persists in the underlying data store. When another administrator loads a page that reflects the manipulated field, the script executes with the victim's session context. Exploitation is remote over the network but requires both high privileges and user interaction, which limits practical impact.

No verified exploit code is available. Refer to the GitHub CVE Documentation and the VulDB CVE Report for the public disclosure details.

Detection Methods for CVE-2026-93975

Indicators of Compromise

HTTP POST requests to admin/edit-user.php containing <script>, onerror=, onload=, or javascript: substrings in the name, sname, email, username, password, or id parameters.
User records in the application database whose stored fields contain HTML tags or JavaScript event handlers.
Unexpected outbound requests from administrator browsers to attacker-controlled domains shortly after loading user management pages.

Detection Strategies

Inspect web server and application logs for anomalous parameter values submitted to admin/edit-user.php, especially requests containing angle brackets or encoded script payloads.
Deploy a Web Application Firewall (WAF) rule set that flags XSS signatures on the user editing endpoint.
Run periodic database queries against the users table to identify entries whose text fields contain HTML markup or script keywords.

Monitoring Recommendations

Alert on administrator sessions that trigger unusual outbound JavaScript-driven requests immediately after visiting the User Editing view.
Monitor for privilege changes or new administrator accounts created shortly after an XSS payload is detected in stored data.
Correlate authentication logs with admin panel access to identify unexpected use of high-privileged accounts.

How to Mitigate CVE-2026-93975

Immediate Actions Required

Restrict access to the admin/ directory to trusted management networks or a VPN until a patched build is available.
Audit existing user records for stored payloads and sanitize or delete any entries containing HTML or JavaScript content.
Enforce strong administrator credential hygiene and multi-factor authentication to reduce the risk of an attacker reaching the vulnerable endpoint.

Patch Information

At the time of publication, no official vendor patch is referenced in the CVE record. Monitor the Code Projects Resource and the VulDB Vulnerability Details page for remediation updates. Until a fix is released, apply the workarounds below and consider retiring the affected 1.0 build if a supported alternative exists.

Workarounds

Add server-side input validation to admin/edit-user.php that rejects HTML metacharacters in name, sname, email, username, password, and id fields.
Apply context-aware output encoding (HTML entity encoding for HTML body, attribute encoding for attribute contexts) wherever these fields are rendered.
Deploy a strict Content Security Policy (CSP) header that disallows inline scripts and restricts script sources to trusted origins.
Place the administrative interface behind a reverse proxy that inspects and filters requests for XSS patterns.

bash

# Example NGINX configuration to add a Content Security Policy header
# and restrict admin path access to a trusted management subnet
location /admin/ {
    allow 10.10.0.0/24;
    deny all;

    add_header Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'" always;
    add_header X-Content-Type-Options "nosniff" always;
    add_header X-Frame-Options "DENY" always;
}