CVE-2019-25759 Overview
CVE-2019-25759 is a SQL injection vulnerability in the Joomla! Component vBizz 1.0.7, a CRM extension developed by WDM Tech. The flaw resides in the employee management interface, where the payid parameter is not properly sanitized before being incorporated into SQL queries. Authenticated attackers can submit POST requests containing crafted payid array values to execute arbitrary SQL statements against the backend database. Successful exploitation enables extraction of sensitive data such as database version, schema names, and stored records. The weakness maps to [CWE-89] (Improper Neutralization of Special Elements used in an SQL Command).
Critical Impact
Authenticated attackers can extract database contents including version information, schema names, and stored CRM records through the vulnerable payid parameter.
Affected Products
- Joomla! Component vBizz CRM version 1.0.7
- WDM Tech vBizz extension for Joomla!
- Joomla! installations with the vBizz CRM component enabled
Discovery Timeline
- 2026-06-19 - CVE-2019-25759 published to the National Vulnerability Database (NVD)
- 2026-06-22 - Last updated in NVD database
Technical Details for CVE-2019-25759
Vulnerability Analysis
The vulnerability exists in the employee management feature of the vBizz CRM component for Joomla!. The application accepts user-controlled input via the payid parameter as an array and concatenates these values directly into SQL queries. No parameterized statements or input validation prevent malicious SQL fragments from being interpreted as code by the database engine.
Authenticated users with low privileges can leverage this flaw to query arbitrary tables. The Exploit-DB entry #46223 documents the attack pattern, demonstrating extraction of database version and schema metadata using union-based and conditional SQL injection techniques.
Root Cause
The root cause is improper neutralization of special characters in SQL commands [CWE-89]. The payid array values bypass server-side validation and reach the database query construction layer without sanitization. Use of prepared statements or strict type enforcement would prevent the injection.
Attack Vector
Exploitation requires network access to the Joomla! site and valid authentication credentials with access to the employee management interface. The attacker submits a POST request with a malicious payid[] array value containing SQL payloads. The injected SQL executes with the privileges of the Joomla! database user, allowing data exfiltration from any table accessible to that account.
The vulnerability is described in prose because no verified, sanitized proof-of-concept is reproduced here. See the Exploit-DB #46223 entry and the VulnCheck Joomla SQL Injection Advisory for full technical details.
Detection Methods for CVE-2019-25759
Indicators of Compromise
- POST requests to the vBizz employee management endpoint containing payid[] parameter values with SQL syntax such as UNION, SELECT, --, or /*.
- Web server logs showing repeated requests from authenticated sessions with abnormal parameter lengths or encoded SQL keywords.
- Database error messages or unexpected query patterns originating from the Joomla! database user during normal CRM activity.
Detection Strategies
- Inspect Joomla! access logs for requests targeting vBizz CRM URLs that include the payid parameter with non-numeric or array-formatted values.
- Enable database query logging and alert on UNION SELECT, information_schema references, or queries returning database metadata initiated by the Joomla! application user.
- Deploy a Web Application Firewall (WAF) rule that flags SQL injection signatures in POST bodies submitted to vBizz endpoints.
Monitoring Recommendations
- Correlate authenticated session activity with anomalous query volume from the Joomla! backend to identify credentialed abuse.
- Monitor for outbound data transfers following suspicious POST requests to the vBizz component.
- Track failed and successful login attempts to Joomla! accounts that have access to the employee management interface.
How to Mitigate CVE-2019-25759
Immediate Actions Required
- Identify Joomla! installations running vBizz CRM 1.0.7 and restrict access to the employee management interface to trusted administrators only.
- Disable the vBizz component if a patched version is not available and the feature is non-essential.
- Rotate Joomla! administrator and database credentials if log review indicates suspicious payid requests.
Patch Information
No vendor patch is referenced in the published CVE record. Administrators should consult the Joomla Extension: Vbizz CRM listing and the WDM Tech site for any updated releases addressing the SQL injection in the payid parameter.
Workarounds
- Place a Web Application Firewall in front of the Joomla! site with rules to block SQL keywords and metacharacters in payid parameter values.
- Restrict the Joomla! database account to least-privilege permissions, removing access to tables not required by the vBizz component.
- Implement IP allow-listing for the Joomla! administrative interface to limit which networks can reach the vulnerable endpoint.
- Review and remove unused Joomla! user accounts to reduce the pool of credentials available for authenticated exploitation.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
