An issue was discovered in Joomla! 2.5.0 through 3.9.27. CMS functions did not properly termine existing user sessions when a user's password was changed or the user was blocked.

According to its self-reported version, the instance of Joomla! running on the remote web server is 2.5.x prior to 3.9.28. It is, therefore, affected by multiple vulnerabilities.

- Inadequate escaping in the Rules field of the JForm API leads to a Cross-Site Scripting (XSS) vulnerability. (CVE-2021-26035)

- Missing validation of input could lead to a broken usergroups table. (CVE-2021-26036)

- Various CMS functions did not properly termine existing user sessions when a user's password was changed or the user was blocked. (CVE-2021-26037)

- Install action in com_installer lack the required hardcoded ACL checks for superusers, leading to various potential attack vectors. (CVE-2021-26038)

- Inadequate escaping in the imagelist view of com_media leads to a Cross-Site Scripting (XSS) vulnerability. (CVE-2021-26039)

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

According to its self-reported version, the instance of Joomla! running on the remote web server is 2.5.x prior to 3.9.28. It is, therefore, affected by multiple vulnerabilities.

  - Inadequate escaping in the Rules field of the JForm API leads to a XSS vulnerability. (CVE-2021-26035)

  - Missing validation of input could lead to a broken usergroups table. (CVE-2021-26036)

  - Various CMS functions did not properly termine existing user sessions when a user's password was changed     or the user was blocked. (CVE-2021-26037)

  - Install action in com_installer lack the required hardcoded ACL checks for superusers, leading to various     potential attack vectors. A default system is not affected cause by default com_installer is limited to     super users already. (CVE-2021-26038)

  - Inadequate escaping in the imagelist view of com_media leads to a XSS vulnerability. (CVE-2021-26039)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
112892	Joomla! 2.5.x < 3.9.28 Multiple Vulnerabilities	Web App Scanning	Component Vulnerability	Version Based	high
151429	Joomla 2.5.x < 3.9.28 Multiple Vulnerabilities (5840-joomla-3-9-28)	Nessus	CGI abuses	Remote	high

Detections

Analytics

CVE-2021-26037

medium

Tenable Plugins

high

high