Stored cross-site scripting in EspoCRM - CVE-2019-14546

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 in the Preference page as well as while sending an email when a malicious payload was inserted inside the Email Signature. A remote attacker can send a specially crafted email, trick the victim to reply or forward the email 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-2019-14546

Sources

• https://gauravnarwani.com/publications/CVE-2019-14546/
• https://github.com/espocrm/espocrm/commit/ffd3f762ce4a8de3b8962f33513e073c55d943b5
• https://github.com/espocrm/espocrm/issues/1369
• https://github.com/espocrm/espocrm/releases/tag/5.6.9