Cross-site scripting in EspoCRM - CVE-2019-14549

Detailed vulnerability description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data inside the title and breadcrumb of a newly formed entity. A remote attacker can inject JavaScript in these values of an entity, trick a victim to visit the publicly accessible link and execute arbitrary HTML and script code in user's browser in context of vulnerable website.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

How to mitigate CVE-2019-14549

Sources

• https://gauravnarwani.com/publications/cve-2019-14549/
• https://github.com/espocrm/espocrm/commit/ffd3f762ce4a8de3b8962f33513e073c55d943b5
• https://github.com/espocrm/espocrm/issues/1369
• https://github.com/espocrm/espocrm/releases/tag/5.6.9