CVE-2025-11358: Simple Banking System SQLi Vulnerability

CVE-2025-11358 Overview

CVE-2025-11358 is a SQL injection vulnerability in code-projects Simple Banking System 1.0. The flaw resides in the /removeuser.php script, where the ID parameter is passed to a database query without sanitization. Attackers can manipulate the ID argument to inject arbitrary SQL statements. The attack is exploitable remotely and requires low-level authenticated access. A public exploit reference has been published, increasing the likelihood of opportunistic abuse against exposed instances. The vulnerability is categorized under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component).

Critical Impact
Remote attackers with low privileges can inject SQL statements through the ID parameter of /removeuser.php, potentially exposing or modifying banking records in the underlying database.

Affected Products

code-projects Simple Banking System 1.0
Component: /removeuser.php
CPE: cpe:2.3:a:codeastro:simple_banking_system:1.0:*:*:*:*:*:*:*

Discovery Timeline

2025-10-07 - CVE-2025-11358 published to the National Vulnerability Database (NVD)
2026-04-29 - Last updated in NVD database

Technical Details for CVE-2025-11358

Vulnerability Analysis

The Simple Banking System is a PHP and MySQL web application. The /removeuser.php endpoint accepts an ID parameter that identifies the user record to remove. The application concatenates this parameter directly into a SQL DELETE or SELECT statement without parameterized queries or input validation. Attackers can supply crafted SQL fragments through the ID argument to alter query logic. Successful injection allows reading, modifying, or deleting database content based on the privileges of the database account used by the application.

Root Cause

The root cause is improper neutralization of user-supplied input prior to its use in SQL statements. The script trusts the ID value supplied via HTTP request parameters and interpolates it directly into the query string. No prepared statements, type casting, or allow-list validation is applied. This pattern matches [CWE-74] and the more specific CWE-89 (SQL Injection) class of issues.

Attack Vector

The attack is network-based and requires authentication at a low privilege level. An attacker submits a request to /removeuser.php?ID=<payload> where <payload> contains SQL metacharacters such as single quotes, UNION SELECT clauses, or boolean conditions. User interaction is not required. Because the endpoint is reachable over HTTP, exploitation can be automated against any internet-exposed deployment. Public references describing the issue are listed in the GitHub Issue Discussion and VulDB #327245.

No verified proof-of-concept code is included here. Refer to the published advisories for technical specifics.

Detection Methods for CVE-2025-11358

Indicators of Compromise

Web server access logs containing requests to /removeuser.php with SQL metacharacters in the ID parameter, such as single quotes, --, UNION, SELECT, or OR 1=1.
Unexpected DELETE or SELECT queries in MySQL general or slow query logs referencing the users table.
Unauthorized removal or modification of user records in the Simple Banking System database.
HTTP 500 responses from /removeuser.php correlated with malformed ID values, indicating injection probing.

Detection Strategies

Deploy a web application firewall rule that inspects the ID parameter on /removeuser.php for SQL syntax tokens.
Enable MySQL query logging and alert on DELETE statements that include sub-selects or boolean tautologies.
Review authentication logs to correlate suspicious requests with the originating low-privileged account.

Monitoring Recommendations

Forward web server, application, and database logs to a centralized analytics platform for correlation across request and query layers.
Baseline normal request patterns to /removeuser.php and alert on deviations in parameter length, character classes, or response codes.
Monitor for outbound connections from the database host that could indicate data exfiltration following successful injection.

How to Mitigate CVE-2025-11358

Immediate Actions Required

Remove /removeuser.php from public network exposure until a fix is applied; restrict access to trusted administrative networks.
Revoke and rotate database credentials used by the application if exploitation is suspected.
Audit the users table and related records for unauthorized deletions or modifications.
Apply least-privilege principles to the database account used by the application so it cannot read or modify unrelated tables.

Patch Information

No official vendor patch has been published for code-projects Simple Banking System 1.0 at the time of CVE publication. Operators should apply application-layer fixes by replacing direct string concatenation with parameterized queries or PDO prepared statements. Track updates through the VulDB CTI #327245 entry and the Code Projects project page.

Workarounds

Rewrite the affected query in /removeuser.php to use prepared statements with bound parameters and cast the ID value to an integer before use.
Add server-side validation that rejects non-numeric ID values before any database interaction.
Deploy a WAF rule to block requests where the ID parameter contains SQL metacharacters.
Restrict the application's MySQL user to the minimum tables and operations required, removing privileges such as DROP, ALTER, and access to administrative schemas.

bash

# Example WAF rule (ModSecurity) to block SQLi patterns on the vulnerable endpoint
SecRule REQUEST_URI "@beginsWith /removeuser.php" \
    "chain,deny,status:403,id:1011358,msg:'CVE-2025-11358 SQLi attempt on ID parameter'"
    SecRule ARGS:ID "@rx (?i)(union(\s|/\*).*select|or\s+1=1|--|;|/\*|\bselect\b.*\bfrom\b)" "t:none,t:urlDecode"