SB2018092118 - Cross-site scripting in EspoCRM

Description

This security bulletin contains information about 2 secuirty vulnerabilities.

1) Cross-site scripting (CVE-ID: CVE-2018-17301)

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

The vulnerability exists due to insufficient sanitization of user-supplied data when processing data passed via /#Account in the search panel. A remote attacker can trick the victim to follow a specially crafted 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.

2) Stored cross-site scripting (CVE-ID: CVE-2018-17302)

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 when processing saved draft messages in /#Email/view. A remote attacker can permanently inject 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.

Remediation

Install update from vendor's website.

References

• https://github.com/espocrm/espocrm/issues/1038
• https://github.com/security-breachlock/CVE-2018-17301/blob/master/Non-persistent%20XSS%20in%20EspoCRM.pdf
• https://github.com/espocrm/espocrm/issues/1039
• https://github.com/security-breachlock/CVE-2018-17302/blob/master/XSS%20(Stored)%20in%20EspoCRM.pdf