CVE-2026-11520: SourceCodester Inventory System header.php cross site scripting
A weakness has been identified in SourceCodester Inventory System 1.0. Affected by this issue is some unknown functionality of the file header.php. This manipulation causes cross site scripting. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. Multiple parameters might be affected.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Remove
Remove
SourceCodester Inventory System header.phpfrom your environment.If the functionality provided by header.php is not required, remove or disable the file or restrict its web access (e.g., deny direct HTTP requests) until a secure fix is implemented.
- Configuration
Implement proper input validation for all parameters processed by header.php and ensure all user-controlled data is HTML-encoded or otherwise escaped before output to prevent reflected or stored cross-site scripting.
SourceCodester Inventory System (header.php) input/output handling = validate inputs; escape/HTML-encode output - Compensating control
Deploy web application firewall (WAF) or web filtering rules to block common XSS payloads and patterns, and consider restricting access to the application (IP allowlist, VPN) until the vulnerability is remediated.
- Operational
Audit logs and stored content for evidence of exploitation (suspicious query parameters or stored scripts), remove any malicious payloads found, and monitor for further attack attempts while fixes are applied.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-11520?
The severity of CVE-2026-11520 is rated as low with a score of 3.5.
How do I fix CVE-2026-11520?
To fix CVE-2026-11520, sanitize and validate all user inputs in the header.php file to prevent cross site scripting.
What type of vulnerability is CVE-2026-11520?
CVE-2026-11520 is classified as a cross site scripting (XSS) vulnerability.
Is it possible to exploit CVE-2026-11520 remotely?
Yes, CVE-2026-11520 can be exploited remotely, allowing attackers to execute cross site scripting attacks.
Which software is affected by CVE-2026-11520?
CVE-2026-11520 affects SourceCodester Inventory System version 1.0.