CVE-2021-45903 : Security Advisory and Response

A persistent cross-site scripting (XSS) issue in the web interface of SuiteCRM before 7.10.35, and 7.11.x and 7.12.x before 7.12.2, allows a remote attacker to introduce arbitrary JavaScript via attachments upload, a different vulnerability than CVE-2021-39267 and CVE-2021-39268.

Understanding CVE-2021-45903

A persistent cross-site scripting (XSS) vulnerability affecting SuiteCRM versions prior to 7.10.35, 7.11.x, and 7.12.x that enables a remote attacker to execute arbitrary JavaScript code.

What is CVE-2021-45903?

The vulnerability permits malicious actors to inject and execute arbitrary JavaScript code via attachment uploads in the SuiteCRM web interface.

The Impact of CVE-2021-45903

The exploit can lead to unauthorized access, data theft, session hijacking, and potential full system compromise.

Technical Details of CVE-2021-45903

The following technical aspects of the CVE provide an in-depth understanding of the issue.

Vulnerability Description

The vulnerability allows remote attackers to perform persistent cross-site scripting (XSS) attacks through malicious JavaScript code injected via attachment uploads on vulnerable SuiteCRM instances.

Affected Systems and Versions

SuiteCRM versions before 7.10.35
SuiteCRM 7.11.x before 7.12.2

Exploitation Mechanism

Attackers can exploit this vulnerability by uploading attachments containing malicious JavaScript, which, when executed, allows them to execute arbitrary code within the context of the affected user's session.

Mitigation and Prevention

Taking immediate and long-term measures can help mitigate the risks associated with CVE-2021-45903.

Immediate Steps to Take

Apply the latest security patches provided by SuiteCRM.
Implement web application firewalls to filter and monitor incoming traffic for malicious payloads.
Educate users about the risks of opening attachments from unknown sources.

Long-Term Security Practices

Regularly update SuiteCRM to the latest versions to patch known vulnerabilities.
Conduct periodic security assessments and penetration testing to identify and address potential weaknesses.

Patching and Updates

Ensure timely application of security updates and patches released by SuiteCRM to address CVE-2021-45903.