CVE-2019-25761 Overview
CVE-2019-25761 is a SQL injection vulnerability [CWE-89] in the Joomla! Component JoomCRM version 1.1.1. Authenticated attackers can execute arbitrary SQL queries by injecting malicious payloads through the deal_id parameter. The vulnerable endpoint is reached via GET requests to index.php with the parameters option=com_joomcrm&view=contacts. Successful exploitation allows attackers to extract sensitive database information, including table names, schemas, and row contents stored by the CRM extension.
Critical Impact
Authenticated attackers can extract arbitrary data from the backing database, including customer records, contacts, and deal information managed by JoomCRM.
Affected Products
- Joomla! Component JoomCRM 1.1.1
- Joomla! installations bundling the vulnerable JoomCRM extension
- Marketing and CRM workflows depending on JoomCRM contact and deal views
Discovery Timeline
- 2026-06-19 - CVE-2019-25761 published to the National Vulnerability Database (NVD)
- 2026-06-22 - Last updated in NVD database
Technical Details for CVE-2019-25761
Vulnerability Analysis
The vulnerability stems from improper sanitization of the deal_id request parameter before it is concatenated into a SQL statement. The JoomCRM contacts view accepts the parameter without validating its type or escaping its content. Attackers issue a crafted GET request to index.php?option=com_joomcrm&view=contacts&deal_id=<payload> and break out of the intended query context. Standard SQL injection techniques such as UNION-based extraction and boolean-based blind injection are viable. Because JoomCRM stores marketing and sales records, the attacker can retrieve contact details, deal pipelines, and any other tables accessible to the Joomla database user.
Root Cause
The component constructs SQL queries through string concatenation rather than parameterized statements or the Joomla query builder bindings. The deal_id value is trusted as numeric input but is never cast or validated. This pattern matches the classic [CWE-89] weakness for improper neutralization of special elements in SQL commands.
Attack Vector
Exploitation requires network access to the Joomla site and a valid authenticated session with permission to view contacts. The attacker sends a single GET request containing SQL syntax inside the deal_id parameter. No user interaction beyond the attacker's own session is required. Public exploitation details are documented in Exploit-DB #46122 and the VulnCheck Joomla SQL Injection Advisory.
No verified proof-of-concept code is reproduced here. Refer to the linked advisories for the exact payload structure used against the deal_id parameter.
Detection Methods for CVE-2019-25761
Indicators of Compromise
- GET requests to index.php containing option=com_joomcrm&view=contacts with SQL metacharacters such as ', UNION, SELECT, --, or /* in the deal_id parameter
- Web server access logs showing repeated requests to the JoomCRM contacts view with varying deal_id values
- Database errors or unusually large response bodies tied to com_joomcrm requests
Detection Strategies
- Inspect Joomla and web server logs for SQL syntax appearing in query string parameters belonging to com_joomcrm
- Deploy a web application firewall ruleset that flags SQLi signatures against the deal_id parameter
- Correlate authenticated Joomla sessions issuing high volumes of requests against the contacts view with database query latency spikes
Monitoring Recommendations
- Forward Apache or Nginx access logs and Joomla audit logs to a central monitoring platform for query-string analysis
- Alert on HTTP responses to com_joomcrm endpoints that return SQL error fragments such as SQLSTATE, you have an error in your SQL syntax, or mysql_fetch
- Track database user activity originating from the Joomla service account for INFORMATION_SCHEMA lookups
How to Mitigate CVE-2019-25761
Immediate Actions Required
- Restrict access to the JoomCRM contacts view to trusted administrative users until a fixed version is confirmed
- Audit Joomla user accounts and revoke unnecessary privileges that grant access to com_joomcrm
- Review database and web logs for prior exploitation attempts targeting the deal_id parameter
Patch Information
No vendor patch is referenced in the available CVE data. Administrators should consult the JoomCRM Extension Details page and the JoomBoost Security Overview for updated releases. If a maintained version is unavailable, consider uninstalling JoomCRM 1.1.1 and migrating to a supported CRM extension.
Workarounds
- Deploy a web application firewall rule that blocks SQL metacharacters in the deal_id parameter for requests targeting com_joomcrm
- Enforce least-privilege on the Joomla database user so that exploitation cannot read tables outside the CRM schema
- Disable the com_joomcrm component in the Joomla extension manager if the CRM functionality is not in active use
# Example ModSecurity rule blocking SQLi patterns against the JoomCRM deal_id parameter
SecRule ARGS:deal_id "@rx (?i)(union(\s|/\*).*select|sleep\(|benchmark\(|information_schema|--|;)" \
"id:1925761,phase:2,deny,status:403,msg:'CVE-2019-25761 JoomCRM SQLi attempt blocked'"
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
