CVE-2026-13555: SQL Injection in itsourcecode Online Hotel Management System 1.0

Technical summary

The vulnerability resides in the user administration controller where user input from the Name parameter is not properly sanitized before being incorporated into SQL queries. The affected endpoint is /admin/mod_users/controller.php with the action=add parameter. By injecting SQL metacharacters and commands into the Name field, an attacker can break out of the intended query context and execute their own SQL statements with the privileges of the database user running the application. The vulnerability is classified under CWE-74 (Improper Neutralization of Special Elements in Output) and CWE-89 (SQL Injection), reflecting both the root cause and its exploitation pattern.

Business impact

A successful exploitation could expose sensitive guest and staff data, including contact information, payment details, and reservation history. Attackers could modify booking records, create unauthorized administrator accounts, or delete audit trails. For hospitality businesses relying on this system, the compromise could result in regulatory penalties under data protection laws, reputational damage, loss of customer trust, and operational disruption during incident response and remediation.

Affected systems

itsourcecode Online Hotel Management System version 1.0 is affected. Organizations using this specific version in production environments are at direct risk. Verify your installed version immediately; later versions may contain patches, but confirmation requires checking vendor release notes or performing a test upgrade in a non-production environment.

Exploitability

This vulnerability is highly exploitable. It requires no authentication, no special user interaction, and can be triggered via a simple HTTP request over the network. The CVSS score of 7.3 reflects the combination of remote exploitability, low attack complexity, and moderate impact scope. The public availability of exploit code significantly lowers the barrier to entry for attackers, making active exploitation likely in the near term.

Remediation

The primary remediation is to upgrade itsourcecode Online Hotel Management System to a patched version released by the vendor. Until patching is possible, implement immediate controls: restrict network access to the /admin/ path to a whitelist of trusted IP addresses, disable or rename the vulnerable controller if not in active use, and monitor database query logs for suspicious SQL patterns. Input validation and parameterized queries must be implemented in any patched version.

Patch guidance

Contact itsourcecode or check their official website and release notes for version updates that address CVE-2026-13555. Verify the patch version against vendor advisories before deployment. Test patches in a staging environment that mirrors production configuration. Given the high severity and public exploit availability, prioritize patching within 48–72 hours if possible. If a patch is not yet available, escalate to your vendor contact and prepare compensating controls for the interim period.

Detection guidance

Monitor access logs for requests to /admin/mod_users/controller.php with action=add parameters containing SQL keywords or special characters (e.g., quotes, semicolons, UNION, SELECT, DROP). Set up database query auditing to detect unusual SQL statements or failed queries that may indicate injection attempts. Hunt for any unauthorized administrator accounts created during the vulnerability exposure window. Intrusion detection systems should be configured with signatures for known SQL injection payloads targeting this endpoint.

Why prioritize this

This vulnerability merits immediate attention due to the combination of high CVSS score (7.3), remote unauthenticated exploitability, public exploit code, and direct access to sensitive business-critical data. The hospitality sector's dependence on customer and booking data, combined with regulatory obligations around data protection, makes this a material risk that could trigger incident response requirements if exploited.

Risk score, explained

The CVSS 3.1 score of 7.3 (HIGH) reflects: network-based attack vector (AV:N), low attack complexity requiring minimal technical sophistication (AC:L), no authentication required (PR:N), no user interaction needed (UI:N), and unchanged attack scope (S:U). The confidentiality, integrity, and availability impacts are each rated as low (L), meaning the attacker can access, modify, or delete data but the system does not become completely unavailable. The score appropriately captures a serious but not critical threat; the public availability of exploit code elevates practical risk beyond the numerical score.

Frequently asked questions