CVE-2019-13643 : Security Advisory and Response

EspoCRM versions prior to 5.6.4 are vulnerable to stored cross-site scripting (XSS) attacks, allowing remote attackers to inject malicious code into webpages.

Understanding CVE-2019-13643

EspoCRM is susceptible to stored XSS attacks, enabling threat actors to execute harmful JavaScript code on targeted webpages.

What is CVE-2019-13643?

EspoCRM versions before 5.6.4 are prone to stored XSS vulnerabilities.
Attackers can inject malicious JavaScript code into webpages by exploiting this flaw.
The vulnerability involves creating a new stream message with an XSS payload.
Clicking on a malicious link on the Notifications page triggers the stored payload.

The Impact of CVE-2019-13643

Remote attackers can execute arbitrary code on affected webpages.
Malicious JavaScript can compromise user data and lead to unauthorized actions.

Technical Details of CVE-2019-13643

EspoCRM's vulnerability to stored XSS attacks has the following technical aspects:

Vulnerability Description

Stored XSS in EspoCRM versions prior to 5.6.4 allows remote attackers to execute malicious JavaScript code.

Affected Systems and Versions

Product: EspoCRM
Vendor: N/A
Versions Affected: All versions before 5.6.4

Exploitation Mechanism

Attackers exploit the vulnerability by creating a new stream message containing an XSS payload.
The injected payload is triggered when a user clicks on a malicious link on the Notifications page.

Mitigation and Prevention

To address CVE-2019-13643, consider the following mitigation strategies:

Immediate Steps to Take

Update EspoCRM to version 5.6.4 or later to patch the vulnerability.
Educate users about the risks of clicking on unknown or suspicious links.

Long-Term Security Practices

Implement regular security training for employees to raise awareness about XSS attacks.
Utilize web application firewalls to detect and block malicious payloads.

Patching and Updates

Regularly monitor for security updates and apply patches promptly to protect against known vulnerabilities.