CVE-2026-10262: Real State Services 1.0 SQLi Vulnerability

CVE-2026-10262 Overview

CVE-2026-10262 is a SQL injection vulnerability in code-projects Real State Services 1.0. The flaw exists in the /loginuser.php file, which is part of the application's Login component. Attackers can manipulate the Username argument to inject arbitrary SQL statements into the underlying database query. The vulnerability is exploitable remotely without authentication or user interaction, and a public exploit disclosure has been published. The issue is classified under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component).

Critical Impact
Unauthenticated remote attackers can inject SQL payloads through the login form to read, modify, or disrupt backend database contents.

Affected Products

code-projects Real State Services 1.0
Component: Login (/loginuser.php)
Parameter: Username

Discovery Timeline

2026-06-01 - CVE-2026-10262 published to NVD
2026-06-01 - Last updated in NVD database

Technical Details for CVE-2026-10262

Vulnerability Analysis

The vulnerability resides in the login handler at /loginuser.php within code-projects Real State Services 1.0. The application accepts the Username parameter from client-submitted form data and concatenates it directly into a SQL query without parameterized binding or input sanitization. An attacker can inject SQL syntax through this parameter and alter the structure of the authentication query.

Because the vulnerable endpoint is the login interface, exploitation requires no prior credentials. The attack vector is network-based with low attack complexity, allowing remote adversaries to reach the endpoint over standard HTTP or HTTPS. The EPSS probability is 0.033%, reflecting limited current exploitation telemetry despite the public disclosure.

Root Cause

The root cause is improper neutralization of special elements [CWE-74] within the SQL statement constructed from the Username POST parameter. The login routine does not use prepared statements or parameter binding, so single quotes, comment markers, and SQL keywords pass through into the executed query. This allows boolean-based, union-based, or time-based injection techniques against the backing database.

Attack Vector

An attacker sends a crafted HTTP POST request to /loginuser.php with a malicious Username value. Payloads such as authentication tautologies or UNION SELECT statements can return rows from arbitrary tables, bypass login checks, or extract credential hashes. The vulnerability mechanism is described in the GitHub CVE Issue Discussion and the VulDB CVE-2026-10262 Listing. No verified exploit code is reproduced here; refer to the linked advisories for technical details.

Detection Methods for CVE-2026-10262

Indicators of Compromise

HTTP POST requests to /loginuser.php containing SQL metacharacters such as ', --, #, OR 1=1, or UNION SELECT in the Username field.
Web server access logs showing repeated failed login attempts followed by anomalously long Username values.
Database errors or mysql_* warnings surfaced in application logs originating from the login handler.
Unexpected outbound database query patterns or large result sets returned from the authentication query.

Detection Strategies

Deploy web application firewall (WAF) signatures that inspect POST bodies to /loginuser.php for SQL injection patterns.
Enable database query auditing to flag authentication queries that return more rows than expected or contain UNION operators.
Correlate web access logs with database audit logs to identify injection attempts that reach the SQL layer.

Monitoring Recommendations

Alert on bursts of POST requests to /loginuser.php from a single source IP within short time windows.
Monitor for HTTP 500 responses or database error strings returned by the login endpoint.
Track authentication success events that lack corresponding valid session creation, indicating possible bypass.

How to Mitigate CVE-2026-10262

Immediate Actions Required

Restrict network access to the Real State Services application to trusted networks or behind a VPN until a fix is applied.
Place a WAF in front of the application with rules blocking SQL injection patterns targeting /loginuser.php.
Review web and database logs retroactively for prior exploitation attempts against the Username parameter.
Rotate database credentials and any user passwords that may have been exposed through the login query.

Patch Information

No vendor patch has been published in the referenced advisories at the time of CVE assignment. Track the VulDB Vulnerability #367542 entry and the Code Projects Resource Hub for fix availability. Operators should plan to replace the vulnerable login query with parameterized statements once a vendor update is released or apply a custom fix in-house.

Workarounds

Replace string concatenation in /loginuser.php with parameterized queries or prepared statements using PDO or mysqli bind parameters.
Apply server-side input validation that rejects non-alphanumeric characters in the Username field before the value reaches SQL.
Configure the database user serving the application with least-privilege permissions to limit the impact of successful injection.
Disable verbose database error messages in production to prevent information disclosure that aids injection refinement.

bash

# Example WAF rule (ModSecurity) blocking SQLi patterns on the login endpoint
SecRule REQUEST_URI "@streq /loginuser.php" \
    "phase:2,chain,deny,status:403,id:1010262,msg:'Possible SQLi on loginuser.php'"
    SecRule ARGS:Username "@rx (?i)(union[\s\+]+select|or[\s\+]+1=1|--|#|';)" "t:none"