CVE-2019-15313 in Zimbra Collaboration
Summary
by MITRE
In Zimbra Collaboration before 8.8.15 Patch 1, there is a non-persistent XSS vulnerability.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Analysis
by VulDB Data Team • 03/26/2024
The vulnerability identified as CVE-2019-15313 represents a non-persistent cross-site scripting flaw within Zimbra Collaboration software prior to version 8.8.15 Patch 1. This issue arises from insufficient input validation and output encoding mechanisms within the web application interface, creating an avenue for malicious actors to inject malicious scripts into user sessions. The vulnerability specifically affects the email client functionality and web-based administrative interfaces of the Zimbra platform, potentially compromising user sessions and sensitive data.
This cross-site scripting vulnerability falls under CWE-79 which categorizes improper neutralization of input during web output, making it a classic example of web application security weakness. The flaw allows attackers to execute malicious scripts in the context of a victim's browser session through crafted input parameters. The non-persistent nature indicates that the malicious code is executed only during the current user interaction and does not get stored on the server, but rather injected into the application's response to a specific request.
The operational impact of this vulnerability extends beyond simple script execution, as it can enable session hijacking, credential theft, and unauthorized access to user mailboxes. Attackers could craft malicious links or email content that, when clicked by an authenticated user, would execute scripts to steal session cookies or redirect users to phishing sites. The vulnerability particularly affects organizations relying on Zimbra for email services, as it could compromise the confidentiality and integrity of email communications, potentially leading to data breaches and unauthorized system access.
Organizations should prioritize immediate patching to address this vulnerability, as the Zimbra Collaboration software releases 8.8.15 Patch 1 specifically remediate this issue through enhanced input validation and output encoding mechanisms. Security teams should also implement network monitoring to detect potential exploitation attempts and consider deploying web application firewalls to provide additional protection layers. The vulnerability aligns with ATT&CK technique T1566 which covers social engineering through malicious content delivery, making it a significant concern for enterprise security posture and compliance requirements.