Stored XSS in EspoCRM before 5.6.4 allows remote attackers to execute malicious JavaScript and inject arbitrary source code into the target pages. The attack begins by storing a new stream message containing an XSS payload. The stored payload can then be triggered by clicking a malicious link on the Notifications page.
Directory traversal vulnerability in EspoCRM before 2.6.0 allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the action parameter to install/index.php.
Cross-site scripting (XSS) vulnerability in EspoCRM before 2.6.0 allows remote attackers to inject arbitrary web script or HTML via the desc parameter in an errors action to install/index.php.