CVE-2017-8783 : Security Advisory and Response

Synacor Zimbra Collaboration Suite (ZCS) version prior to 8.7.10 is vulnerable to Persistent XSS.

Understanding CVE-2017-8783

The vulnerability in Synacor Zimbra Collaboration Suite (ZCS) could allow an attacker to execute malicious scripts in a victim's browser.

What is CVE-2017-8783?

Persistent XSS vulnerability in Synacor Zimbra Collaboration Suite (ZCS) version before 8.7.10.

The Impact of CVE-2017-8783

Attackers can inject malicious scripts into web pages viewed by users, leading to unauthorized access or data theft.

Technical Details of CVE-2017-8783

The technical aspects of the vulnerability in Synacor Zimbra Collaboration Suite.

Vulnerability Description

Synacor Zimbra Collaboration Suite (ZCS) version prior to 8.7.10 is prone to Persistent XSS.

Affected Systems and Versions

Product: Synacor Zimbra Collaboration Suite (ZCS)
Versions affected: Versions prior to 8.7.10

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting malicious scripts into web pages or emails, which are then executed in the context of the victim's session.

Mitigation and Prevention

Steps to mitigate and prevent exploitation of CVE-2017-8783.

Immediate Steps to Take

Update Synacor Zimbra Collaboration Suite (ZCS) to version 8.7.10 or later to patch the vulnerability.
Educate users about the risks of clicking on suspicious links or opening attachments from unknown sources.

Long-Term Security Practices

Regularly monitor and audit web applications for vulnerabilities like XSS.
Implement content security policies (CSP) to mitigate the impact of XSS attacks.
Conduct security training for developers to write secure code and prevent XSS vulnerabilities.

Patching and Updates

Apply security patches and updates provided by Synacor for the Zimbra Collaboration Suite to address known vulnerabilities.