CVE-2026-108920: Drug Recommendation System XSS Vulnerability

CVE-2026-108920 Overview

CVE-2026-108920 is a reflected cross-site scripting (XSS) vulnerability in SourceCodester Drug Recommendation System 1.0. The flaw resides in the Admin/user_record.php file within the Admin Record Tables component. Attackers can manipulate the name or email parameters to inject malicious script content that executes in the browser of any administrator viewing the record. The attack is launched remotely over the network and requires user interaction to trigger. Public disclosure of the exploit details increases the likelihood of opportunistic use against unpatched installations.

Critical Impact

Successful exploitation enables script execution in an administrator's browser session, enabling session theft, forced actions, or defacement of the admin interface.

Affected Products

• SourceCodester Drug Recommendation System 1.0
• Component: Admin Record Tables (Admin/user_record.php)
• Affected parameters: name, email

Discovery Timeline

• 2026-10-12 - CVE-2026-108920 published to the National Vulnerability Database (NVD)
• 2026-10-15 - Last updated in NVD database

Technical Details for CVE-2026-108920

Vulnerability Analysis

The vulnerability is classified under CWE-79: Improper Neutralization of Input During Web Page Generation. The Admin/user_record.php script writes attacker-controlled values for the name and email fields into HTML output without proper encoding or sanitization. When an administrator loads the record table page, the injected payload executes in the context of the application origin.

The issue is remotely triggerable and does not require authentication to inject the stored or reflected payload, though a privileged user must view the affected page. Impact is limited to integrity of browser-rendered content and any actions performable within the admin session. Confidentiality and availability of server-side data are not directly affected by the XSS primitive itself.

Root Cause

The application fails to apply contextual output encoding when rendering user-supplied name and email values inside the HTML of Admin/user_record.php. PHP functions such as htmlspecialchars() or templating with automatic escaping are not applied, allowing raw HTML and JavaScript to be interpreted by the browser.

Attack Vector

An attacker submits a crafted name or email value through the application's user registration or record creation workflow. The payload persists in the backend data store. When an administrator opens the Admin Record Tables view, the browser renders the injected script and executes it under the application's origin, giving the attacker access to admin cookies, DOM content, and authenticated requests.

See the VulDB entry for CVE-2026-108920 and VulDB vulnerability record 416733 for technical disclosure details. No verified public proof-of-concept code is referenced in the enriched data.

Detection Methods for CVE-2026-108920

Indicators of Compromise

• Submitted name or email field values containing HTML tags such as <script>, <img, <svg, or onerror= handlers.
• Unexpected outbound requests from admin browsers to attacker-controlled domains shortly after loading Admin/user_record.php.
• Admin session cookies observed in access logs of unrelated external hosts.

Detection Strategies

• Review web server access logs for POST or GET requests to user registration endpoints with angle brackets or JavaScript keywords in name or email parameters.
• Deploy a web application firewall (WAF) rule set targeting XSS payload signatures and monitor alerts on paths containing user_record.php.
• Inspect database records in the users table for stored HTML or script fragments in name and email columns.

Monitoring Recommendations

• Alert on administrator browser sessions that generate anomalous outbound requests after visiting admin record pages.
• Correlate authentication events with unusual admin-initiated actions that may indicate forced request execution via injected script.
• Enable Content Security Policy (CSP) violation reporting to surface attempted script execution from unexpected sources.

How to Mitigate CVE-2026-108920

Immediate Actions Required

• Restrict access to the Drug Recommendation System administrative interface to trusted networks or VPN until a fix is applied.
• Audit existing user records for malicious HTML or JavaScript content in name and email fields and sanitize or remove affected rows.
• Instruct administrators to clear browser sessions and rotate credentials if any suspicious activity is observed on Admin/user_record.php.

Patch Information

No vendor patch is referenced in the enriched CVE data. SourceCodester distributes the Drug Recommendation System as sample source code. Administrators should modify the affected file directly by applying contextual output encoding to the name and email fields before rendering, for example using htmlspecialchars($value, ENT_QUOTES, 'UTF-8') in PHP. Monitor the SourceCodester project site for any updated release.

Workarounds

• Apply server-side input validation that rejects angle brackets and HTML entities in name and email submissions.
• Deploy a WAF rule to block requests to user record endpoints containing XSS indicators such as <script, javascript:, or event handler attributes.
• Enforce a strict Content Security Policy that disallows inline scripts and limits script sources to trusted origins.

# Example Content-Security-Policy header in Apache configuration
Header set Content-Security-Policy "default-src 'self'; script-src 'self'; object-src 'none'; base-uri 'self'; frame-ancestors 'none'"