CVE-2019-25527: Inout EasyRooms SQL Injection Vulnerability

CVE-2019-25527 Overview

CVE-2019-25527 is a SQL Injection vulnerability affecting Inout EasyRooms Ultimate Edition v1.0. The vulnerability allows unauthenticated attackers to manipulate database queries by injecting SQL code through the numguest parameter. Attackers can send POST requests to the search/searchdetailed endpoint with malicious SQL payloads to bypass authentication, extract sensitive data, or modify database contents.

Critical Impact

Unauthenticated attackers can exploit this SQL injection flaw to extract sensitive information from the database, bypass authentication mechanisms, or potentially modify database contents, compromising the confidentiality and integrity of the entire application.

Affected Products

• Inout EasyRooms Ultimate Edition v1.0

Discovery Timeline

• 2026-03-12 - CVE-2019-25527 published to NVD
• 2026-03-12 - Last updated in NVD database

Technical Details for CVE-2019-25527

Vulnerability Analysis

This SQL injection vulnerability (CWE-89) exists in the Inout EasyRooms Ultimate Edition application due to improper sanitization of user-supplied input in the numguest parameter. When a user submits a search request to the search/searchdetailed endpoint, the application directly incorporates the numguest parameter value into SQL queries without proper validation or parameterization.

The vulnerability is network-accessible and requires no authentication or user interaction to exploit, making it particularly dangerous. An attacker can craft malicious POST requests containing SQL injection payloads that are then executed directly against the backend database. This can lead to unauthorized data access, data exfiltration, or database manipulation.

Root Cause

The root cause of this vulnerability is the failure to implement proper input validation and parameterized queries when processing the numguest parameter. The application concatenates user-supplied input directly into SQL statements, creating a classic SQL injection condition. This lack of input sanitization allows attackers to break out of the intended query context and inject arbitrary SQL commands.

Attack Vector

The attack is executed over the network by sending specially crafted POST requests to the search/searchdetailed endpoint. An attacker manipulates the numguest parameter by injecting SQL syntax that alters the intended query logic. This can include UNION-based injection to extract data from other tables, Boolean-based blind injection to enumerate database contents, or time-based blind injection techniques. Since no authentication is required, any network-reachable attacker can exploit this vulnerability. For technical details and proof-of-concept information, refer to Exploit-DB #46630 and the VulnCheck SQL Injection Advisory.

Detection Methods for CVE-2019-25527

Indicators of Compromise

• Unusual or malformed POST requests to the search/searchdetailed endpoint containing SQL syntax characters such as single quotes, double dashes, or UNION keywords
• Web application logs showing SQL error messages or database exceptions triggered by malformed numguest parameter values
• Unexpected database queries or data access patterns originating from the web application server
• Evidence of data exfiltration or unauthorized database reads in database audit logs

Detection Strategies

• Deploy Web Application Firewall (WAF) rules to detect and block SQL injection patterns in POST parameters targeting the searchdetailed endpoint
• Implement application-level logging to capture and alert on suspicious parameter values containing SQL metacharacters
• Enable database query logging and monitor for anomalous query patterns or unauthorized table access
• Use intrusion detection systems (IDS) with signatures for common SQL injection attack patterns

Monitoring Recommendations

• Monitor web server access logs for repeated requests to search/searchdetailed with varying numguest parameter values
• Set up alerts for HTTP 500 errors or database connection errors that may indicate exploitation attempts
• Track database user activity for unexpected SELECT statements against sensitive tables
• Implement real-time monitoring of outbound network traffic for potential data exfiltration following successful exploitation

How to Mitigate CVE-2019-25527

Immediate Actions Required

• Take the affected Inout EasyRooms Ultimate Edition v1.0 application offline or restrict network access until remediation is complete
• Implement Web Application Firewall (WAF) rules to filter SQL injection patterns in the numguest parameter
• Review database logs for evidence of prior exploitation and assess potential data compromise
• If possible, modify the application code to use parameterized queries or prepared statements for the vulnerable endpoint

Patch Information

No vendor patch information is currently available for this vulnerability. Organizations should contact Inout Scripts directly for remediation guidance or consider migrating to a more secure alternative solution. Monitor the VulnCheck SQL Injection Advisory for updates.

Workarounds

• Deploy a reverse proxy or WAF in front of the application to filter malicious SQL injection payloads before they reach the vulnerable endpoint
• Restrict network access to the application to trusted IP addresses only using firewall rules
• If source code access is available, implement input validation to sanitize the numguest parameter, rejecting any non-numeric values
• Consider disabling or removing the search/searchdetailed functionality if it is not business-critical

# Example WAF rule to block SQL injection in numguest parameter (ModSecurity)
SecRule ARGS:numguest "@detectSQLi" \
    "id:1001,\
    phase:2,\
    deny,\
    status:403,\
    log,\
    msg:'SQL Injection attempt detected in numguest parameter',\
    tag:'application-multi',\
    tag:'language-multi',\
    tag:'attack-sqli'"