CVE-2019-25525: Inout EasyRooms Ultimate SQLi Vulnerability

CVE-2019-25525 Overview

Inout EasyRooms Ultimate Edition v1.0 contains an SQL injection vulnerability that allows unauthenticated attackers to manipulate database queries by injecting SQL code through the guests parameter. Attackers can send POST requests to the search/rentals endpoint with malicious SQL payloads to bypass authentication, extract sensitive data, or modify database contents.

Critical Impact

This vulnerability enables unauthenticated attackers to execute arbitrary SQL commands against the backend database, potentially leading to complete data exfiltration, authentication bypass, and database manipulation without requiring any user credentials.

Affected Products

• Inout EasyRooms Ultimate Edition v1.0

Discovery Timeline

• 2026-03-12 - CVE CVE-2019-25525 published to NVD
• 2026-03-12 - Last updated in NVD database

Technical Details for CVE-2019-25525

Vulnerability Analysis

This SQL injection vulnerability (CWE-89) exists in the Inout EasyRooms Ultimate Edition v1.0 property rental management system. The application fails to properly sanitize user-supplied input in the guests parameter when processing search requests at the search/rentals endpoint.

When a user submits a rental search request, the application directly incorporates the guests parameter value into SQL queries without adequate input validation or parameterized queries. This allows attackers to break out of the intended query structure and inject arbitrary SQL commands that the database will execute with the same privileges as the application's database user.

The vulnerability is particularly severe because it does not require authentication—any remote attacker with network access to the application can exploit this flaw.

Root Cause

The root cause of this vulnerability is improper input validation and the use of dynamic SQL query construction. The application concatenates user-supplied input directly into SQL statements rather than using prepared statements or parameterized queries. This classic SQL injection pattern occurs when developers fail to treat all user input as untrusted data that must be sanitized or properly escaped before inclusion in database queries.

Attack Vector

The attack is network-based and requires no authentication or user interaction. An attacker can craft malicious HTTP POST requests to the search/rentals endpoint, injecting SQL code through the guests parameter. The injected SQL commands are then executed by the database server, allowing the attacker to:

• Extract sensitive information from the database including user credentials, personal data, and booking information
• Bypass authentication mechanisms to gain unauthorized access
• Modify or delete database records
• Potentially escalate to remote code execution depending on database configuration and privileges

Technical details and proof-of-concept information are available in the Exploit-DB #46630 advisory.

Detection Methods for CVE-2019-25525

Indicators of Compromise

• Unusual or malformed requests to the search/rentals endpoint containing SQL syntax characters such as single quotes, semicolons, or SQL keywords
• Web server logs showing repeated POST requests with suspicious guests parameter values
• Database logs indicating unexpected queries, union-based injections, or error-based SQL extraction attempts
• Signs of data exfiltration or unauthorized database access in application audit logs

Detection Strategies

• Implement web application firewall (WAF) rules to detect and block SQL injection patterns in HTTP parameters
• Configure intrusion detection/prevention systems (IDS/IPS) with signatures for SQL injection attack patterns targeting the search/rentals endpoint
• Enable detailed logging on the web server and database to capture and alert on suspicious query patterns
• Deploy runtime application self-protection (RASP) solutions to detect SQL injection attempts at the application layer

Monitoring Recommendations

• Monitor database query logs for anomalous patterns including UNION SELECT statements, time-based delays, or error-generating queries
• Set up alerts for high volumes of requests to the search/rentals endpoint or requests containing SQL metacharacters
• Review web server access logs regularly for exploitation attempts against this and similar endpoints
• Implement database activity monitoring to detect unauthorized data access or extraction

How to Mitigate CVE-2019-25525

Immediate Actions Required

• Take the vulnerable Inout EasyRooms Ultimate Edition v1.0 application offline or restrict network access until patched
• Deploy a web application firewall (WAF) with SQL injection protection rules as an interim measure
• Review database and application logs for evidence of prior exploitation attempts
• Audit database contents and user accounts for unauthorized changes or data theft

Patch Information

No vendor patch information is currently available in the CVE data. Administrators should contact the vendor directly for remediation guidance or consider replacing the vulnerable software with a maintained alternative. For technical details, refer to the VulnCheck Advisory.

Workarounds

• Implement input validation at the application level to reject requests containing SQL metacharacters in the guests parameter
• Deploy a reverse proxy or WAF configured to sanitize or block malicious SQL injection payloads
• Restrict database user privileges to minimum required permissions to limit the impact of successful exploitation
• Consider network segmentation to limit which systems can access the vulnerable application

# Example WAF rule for ModSecurity to block SQL injection in guests parameter
SecRule ARGS:guests "@detectSQLi" \
    "id:100001,\
    phase:2,\
    block,\
    msg:'SQL Injection attempt detected in guests parameter',\
    logdata:'Matched Data: %{MATCHED_VAR} found within %{MATCHED_VAR_NAME}',\
    severity:'CRITICAL'"