CVE-2026-15703 Overview
CVE-2026-15703 is a SQL injection vulnerability in SourceCodester Simple and Nice Shopping Cart Script 1.0. The flaw resides in /admin/userproductdeletequery.php, where the user_id parameter is passed to a database query without proper sanitization. Remote attackers can manipulate this argument to inject arbitrary SQL statements against the backend database.
The issue is classified under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component). Public exploit details have been disclosed through VulDB and a corresponding GitHub issue, lowering the barrier to exploitation.
Critical Impact
Unauthenticated remote attackers can inject arbitrary SQL queries through the user_id parameter, potentially exposing or modifying data stored in the shopping cart database.
Affected Products
- SourceCodester Simple and Nice Shopping Cart Script 1.0
- Component: /admin/userproductdeletequery.php
- Vulnerable parameter: user_id
Discovery Timeline
- 2026-07-14 - CVE-2026-15703 published to NVD
- 2026-07-15 - Last updated in NVD database
Technical Details for CVE-2026-15703
Vulnerability Analysis
The vulnerability affects the administrative endpoint /admin/userproductdeletequery.php in Simple and Nice Shopping Cart Script 1.0. The script accepts a user_id argument and concatenates it directly into a SQL statement used to delete user product records. Because the input is neither parameterized nor sanitized, attacker-controlled characters break out of the intended query context.
An attacker with network access to the application can issue crafted HTTP requests containing SQL metacharacters in the user_id parameter. The database interprets these characters as part of the query structure rather than as data. This allows unauthorized read, modification, or deletion of records depending on the backend privilege configuration.
Exploitation does not require valid credentials, and no user interaction is needed. The EPSS score of 0.328% reflects limited observed exploitation activity, but public disclosure through VulDB entries #378250 and #856152 increases the likelihood of opportunistic scanning.
Root Cause
The root cause is missing input validation and the use of dynamic SQL concatenation instead of prepared statements. The user_id parameter is trusted directly from the HTTP request and inserted into a DELETE query. Any deviation from an expected numeric identifier alters the query semantics.
Attack Vector
Exploitation occurs over the network against the vulnerable PHP endpoint. An attacker sends an HTTP request with a malicious user_id value. Typical payloads include boolean-based, union-based, or time-based blind SQL injection strings that extract data or manipulate records. The vulnerability manifests through unsanitized parameter handling, and readers should consult the VulDB entry for detailed technical evidence.
Detection Methods for CVE-2026-15703
Indicators of Compromise
- HTTP requests to /admin/userproductdeletequery.php containing SQL metacharacters such as ', --, UNION, SLEEP(, or OR 1=1 in the user_id parameter.
- Web server access logs showing non-numeric values submitted for user_id.
- Unexpected DELETE operations or anomalous row counts in the shopping cart database tables.
- Database error messages returned in HTTP responses referencing SQL syntax faults.
Detection Strategies
- Deploy web application firewall (WAF) rules that inspect the user_id parameter for SQL injection signatures on the /admin/userproductdeletequery.php path.
- Enable database query logging and alert on DELETE statements originating from the shopping cart application with unusual WHERE clauses.
- Correlate application logs with authentication events to identify unauthenticated access to administrative endpoints.
Monitoring Recommendations
- Monitor outbound traffic from the web server for signs of data exfiltration following requests to the vulnerable endpoint.
- Track failed and successful admin panel access attempts against baseline patterns.
- Alert on repeated requests to /admin/userproductdeletequery.php from single source IPs within short time windows.
How to Mitigate CVE-2026-15703
Immediate Actions Required
- Restrict network access to the /admin/ directory using IP allowlists or authenticated reverse proxy controls.
- Take the application offline if it is exposed to untrusted networks and cannot be immediately hardened.
- Review database logs for signs of prior exploitation, focusing on unexpected DELETE or SELECT activity.
- Rotate database credentials used by the application if compromise is suspected.
Patch Information
No official vendor patch has been published for Simple and Nice Shopping Cart Script 1.0 at the time of disclosure. Administrators should consult the SourceCodester project page for updates and review the GitHub issue tracker for community-provided fixes.
Workarounds
- Modify /admin/userproductdeletequery.php to use parameterized queries or PDO prepared statements instead of string concatenation.
- Enforce strict server-side validation ensuring user_id is a positive integer before it reaches the database layer.
- Deploy a WAF with SQL injection rulesets in front of the application until source-level fixes are applied.
- Apply least-privilege permissions to the database account used by the shopping cart, removing rights not required for normal operation.
# Example WAF rule concept (ModSecurity) blocking non-numeric user_id
SecRule REQUEST_URI "@contains /admin/userproductdeletequery.php" \
"chain,phase:2,deny,status:403,id:1015703,msg:'CVE-2026-15703 SQLi attempt'"
SecRule ARGS:user_id "!@rx ^[0-9]+$" "t:none"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
