An issue was discovered in Joomla! before 3.9.3. A combination of specific web server configurations, in connection with specific file types and browser-side MIME-type sniffing, causes an XSS attack vector.

According to its self-reported version number, the Joomla! installation running on the remote web server is prior to 3.9.3. 

In versions prior to 3.9.3, a cross-site scripting (XSS) vulnerability exists due to improper validation of user-supplied input before returning it to users. An unauthenticated, remote attacker can exploit this, by convincing a user to click a specially crafted URL, to execute arbitrary script code in a user's browser session.

Note that Nessus has not attempted to exploit these issues but has instead relied only on the application's self-reported version number.

According to its self-reported version number, the detected Joomla! application is affected by multiple vulnerabilities :

- XSS in URL fields in various core components affects Joomla 2.5.0 through 3.9.2

- XSS in browserside mime-type sniffing affects Joomla 1.0.0 through 3.9.2

- "No Filtering" textfilter overriding child settings in the Global Configuration affects Joomla 2.5.0 through 3.9.2

- Stored XSS issue in the Global Configuration help url affects Joomla 2.5.0 through 3.9.2

- XSS Issue in core.js writeDynaList affects Joomla 2.5.0 through 3.9.2

- phar:// stream wrapper used for object injection attacks affects Joomla 2.5.0 through 3.9.2

Note that the scanner has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
122420	Joomla! prior to 3.9.3 Cross-Site Scripting (XSS) Vulnerability	Nessus	CGI abuses	Remote	medium
98521	Joomla! 1.0.x < 3.9.3 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	critical

Detections

Analytics

CVE-2019-7742

medium

Tenable Plugins

medium

critical