CVE-2026-13555: Hotel Management System SQLi Vulnerability

CVE-2026-13555 Overview

CVE-2026-13555 is a SQL injection vulnerability in itsourcecode Online Hotel Management System 1.0. The flaw resides in /admin/mod_users/controller.php?action=add, where the Name parameter is passed to database queries without proper sanitization. Attackers can inject arbitrary SQL statements remotely without authentication or user interaction. The exploit has been published, increasing the likelihood of opportunistic attacks against exposed installations. The weakness is classified under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component).

Critical Impact
Remote unauthenticated attackers can manipulate backend database queries through the Name argument, potentially exposing user credentials and hotel operational data.

Affected Products

itsourcecode Online Hotel Management System 1.0
Component: /admin/mod_users/controller.php
Vulnerable parameter: Name (action=add)

Discovery Timeline

2026-06-29 - CVE-2026-13555 published to NVD
2026-06-29 - Last updated in NVD database

Technical Details for CVE-2026-13555

Vulnerability Analysis

The vulnerability exists in the user administration module of the Online Hotel Management System. When an administrator submits the add-user form, the controller located at /admin/mod_users/controller.php?action=add processes the Name parameter and concatenates it directly into a SQL statement. Because the value is not parameterized or escaped, an attacker can break out of the intended string context and append arbitrary SQL clauses. Exploitation requires only network access to the admin endpoint, and public proof-of-concept material referenced through VulDB and GitHub demonstrates the attack path. Successful injection can be used to enumerate database contents, extract stored credentials, or modify records used by the hotel management workflow.

Root Cause

The root cause is improper neutralization of user-supplied input before it reaches the database driver. The Name argument is treated as a trusted string and inserted into a dynamic query, bypassing prepared statements or input validation. This pattern is a textbook example of [CWE-74] injection weakness in PHP applications that rely on string concatenation for query construction.

Attack Vector

The attack vector is network-based and requires no privileges or user interaction. An attacker sends a crafted HTTP request to the vulnerable endpoint containing SQL metacharacters within the Name parameter. The server executes the modified query against the backend MySQL database. Because the endpoint sits inside the /admin/ path, exposure depends on whether the administrative interface is reachable from untrusted networks. Public exploit disclosure raises the probability of automated scanning against internet-facing deployments.

No verified proof-of-concept code is reproduced here. Refer to the GitHub Issue Discussion and VulDB CVE-2026-13555 entries for published technical details.

Detection Methods for CVE-2026-13555

Indicators of Compromise

HTTP POST or GET requests to /admin/mod_users/controller.php?action=add containing SQL syntax such as UNION SELECT, OR 1=1, single quotes, or comment markers (--, #) within the Name field.
Unexpected creation, modification, or enumeration of rows in the users table of the hotel management database.
Web server logs showing repeated requests to the mod_users endpoint from a single source with varying payloads.

Detection Strategies

Deploy web application firewall rules that inspect request bodies destined for /admin/mod_users/controller.php and flag SQL metacharacters in the Name parameter.
Enable database query logging and alert on queries against the users table that contain concatenated payload fragments or boolean tautologies.
Correlate authentication failures and administrative access attempts with anomalous request patterns to the affected controller.

Monitoring Recommendations

Forward web server, PHP error, and MySQL general logs to a centralized analytics platform for cross-source correlation.
Baseline normal request volume to the mod_users controller and alert on statistically significant spikes.
Monitor egress traffic from the application server for signs of database exfiltration following suspicious admin-panel activity.

How to Mitigate CVE-2026-13555

Immediate Actions Required

Restrict network access to the /admin/ directory using IP allowlists, VPN, or reverse-proxy authentication until a fix is applied.
Audit the users table and administrator accounts for unauthorized entries or privilege changes.
Rotate credentials for any accounts stored within the hotel management database.

Patch Information

No official vendor patch has been published for itsourcecode Online Hotel Management System 1.0 at the time of writing. Organizations running this application should track the IT Source Code Resource and the VulDB Vulnerability #374563 entry for future advisories. In the absence of a vendor update, apply code-level remediation by replacing dynamic SQL concatenation with parameterized queries or PDO prepared statements in controller.php.

Workarounds

Modify controller.php to bind the Name parameter using mysqli_prepare or PDO prepared statements instead of string concatenation.
Apply server-side input validation that rejects non-alphanumeric characters in the Name field before it reaches the database layer.
Deploy a web application firewall signature that blocks SQL injection payloads targeting the mod_users controller.
Consider taking the application offline or isolating it on an internal network segment until secure code changes are verified.

bash

# Example WAF rule (ModSecurity) blocking SQLi against the vulnerable endpoint
SecRule REQUEST_URI "@contains /admin/mod_users/controller.php" \
  "phase:2,chain,deny,status:403,id:2026013555,\
   msg:'CVE-2026-13555 SQLi attempt on Name parameter'"
  SecRule ARGS:Name "@detectSQLi" \
    "t:none,t:urlDecodeUni"