CVE-2019-25440: WebIncorp ERP SQL Injection Vulnerability

CVE-2019-25440 Overview

CVE-2019-25440 is an SQL injection vulnerability [CWE-89] affecting WebIncorp ERP. The flaw resides in the product_detail.php endpoint, which fails to sanitize the prod_id GET parameter before incorporating it into a database query. Unauthenticated remote attackers can inject arbitrary SQL syntax to read sensitive data from the backing database. Public exploit code has been available via Exploit-DB entry 47199 since the original 2019 disclosure, and the CVE was formally published to the NVD in 2026.

Critical Impact

Unauthenticated attackers can extract database contents — including credentials, customer records, and business data — by sending a single crafted HTTP GET request to product_detail.php.

Affected Products

• WebIncorp ERP — all versions (per VulnCheck advisory)
• Web application component: product_detail.php
• Vulnerable parameter: prod_id (GET)

Discovery Timeline

• 2026-02-22 - CVE-2019-25440 published to NVD
• 2026-04-15 - Last updated in NVD database

Technical Details for CVE-2019-25440

Vulnerability Analysis

The vulnerability is a classic SQL injection in the product detail handler of WebIncorp ERP. The application accepts the prod_id query string parameter and concatenates it directly into a SQL statement executed against the back-end database. No prepared statements, parameter binding, or input validation are applied. Because the endpoint is reachable without authentication, any network-adjacent attacker who can reach the web server can issue malicious requests.

The attack is low complexity and requires no user interaction. Successful exploitation yields read access to arbitrary database tables, enabling extraction of usernames, password hashes, financial records, and other sensitive ERP data. While the CVSS v4 vector indicates high confidentiality impact with low integrity impact, attackers who chain UNION-based or stacked queries on permissive database configurations may also modify records depending on the database user's privileges.

Root Cause

The root cause is improper neutralization of special elements used in a SQL command [CWE-89]. The prod_id value flows from the HTTP request into a dynamic SQL query without sanitization or parameterized binding. Any SQL metacharacters supplied by the client are interpreted by the database engine as syntax rather than data.

Attack Vector

Exploitation occurs over the network through standard HTTP. An attacker sends a GET request to product_detail.php with a malicious prod_id value containing SQL operators such as UNION SELECT, boolean conditions, or time-based payloads. The application reflects the injection result either directly in the rendered page or through observable response timing, allowing both in-band and blind extraction techniques. Automated tooling such as sqlmap can fully enumerate the database against this endpoint.

No authenticated session, CSRF token, or special header is required. Public proof-of-concept material is documented in Exploit-DB #47199 and the VulnCheck Advisory for WebIncorp ERP.

Detection Methods for CVE-2019-25440

Indicators of Compromise

• HTTP GET requests to /product_detail.php containing SQL keywords in the prod_id parameter such as UNION, SELECT, SLEEP(, BENCHMARK(, OR 1=1, or encoded variants (%27, %20UNION%20).
• Web server access logs showing unusually long prod_id values or repeated requests with incrementing payloads consistent with sqlmap fingerprinting.
• Database error messages referencing MySQL/MariaDB syntax surfacing in HTTP responses or application error logs.
• Outbound DNS or HTTP callbacks from the database host triggered by out-of-band SQL injection payloads.

Detection Strategies

• Deploy web application firewall (WAF) rules that flag SQL metacharacters and known injection signatures targeting the prod_id parameter.
• Enable database query logging and alert on queries containing unbalanced quotes, UNION SELECT patterns, or INFORMATION_SCHEMA access originating from the ERP service account.
• Correlate web access logs with database audit logs to identify requests whose parameters appear verbatim inside executed SQL statements.

Monitoring Recommendations

• Monitor for spikes in 500-class HTTP responses from product_detail.php, which often indicate SQL syntax errors triggered by exploitation attempts.
• Track high-volume reads against sensitive tables such as users, customers, or orders by the web application database user.
• Alert on egress traffic from the database server to unexpected destinations, which can indicate out-of-band data exfiltration.

How to Mitigate CVE-2019-25440

Immediate Actions Required

• Restrict network access to the WebIncorp ERP application to trusted IP ranges or place it behind a VPN until a vendor patch is verified.
• Deploy WAF rules blocking SQL injection patterns in the prod_id parameter on product_detail.php.
• Rotate database credentials and application secrets if exploitation is suspected based on log review.
• Audit the database user assigned to the ERP application and revoke any privileges beyond what the application requires.

Patch Information

No vendor-supplied patch is referenced in the NVD entry or the VulnCheck Advisory, which describes the issue as affecting every version of WebIncorp ERP. Operators should contact the vendor directly to confirm the current patch status. If no fix is available, treat the application as unsupported and plan compensating controls or migration.

Workarounds

• Modify product_detail.php to use parameterized queries or prepared statements with bound parameters instead of string concatenation when source access is available.
• Add server-side input validation that constrains prod_id to a numeric type and rejects any request containing non-digit characters.
• Apply least-privilege database permissions so the ERP database account cannot read sensitive tables or execute administrative statements.
• Place the application behind a reverse proxy enforcing strict parameter allowlists for the affected endpoint.

# Example ModSecurity rule blocking SQLi patterns on the vulnerable parameter
SecRule ARGS:prod_id "@rx (?i)(union(\s|/\*.*\*/)+select|sleep\s*\(|benchmark\s*\(|or\s+1=1|';|--|/\*)" \
    "id:1925440,\
     phase:2,\
     deny,\
     status:403,\
     log,\
     msg:'CVE-2019-25440 WebIncorp ERP SQLi attempt on prod_id',\
     tag:'CWE-89'"

# Example Nginx location block restricting prod_id to digits only
location = /product_detail.php {
    if ($arg_prod_id !~ "^[0-9]+$") {
        return 403;
    }
    fastcgi_pass php_backend;
}