CVE-2019-20102 : Vulnerability Insights and Analysis

Atlassian Confluence Server versions 6.14.0 to 6.14.3 and 6.15.0 to 6.15.5 are vulnerable to stored cross-site scripting attacks through malicious attachments.

Understanding CVE-2019-20102

This CVE involves a security vulnerability in Atlassian Confluence Server that allows remote attackers to exploit the attachment upload feature.

What is CVE-2019-20102?

The vulnerability in Atlassian Confluence Server versions 6.14.0 to 6.14.3 and 6.15.0 to 6.15.5 enables attackers to execute stored cross-site scripting attacks using manipulated attachment parameters.

The Impact of CVE-2019-20102

Remote attackers can perform stored cross-site scripting (SXSS) attacks through malicious attachments
Attackers can manipulate the

mimeType

parameter to execute the exploit

Technical Details of CVE-2019-20102

This section provides detailed technical information about the CVE.

Vulnerability Description

The vulnerability allows remote attackers to conduct stored cross-site scripting (SXSS) attacks by leveraging the attachment upload feature in Atlassian Confluence Server.

Affected Systems and Versions

Atlassian Confluence Server versions 6.14.0 to 6.14.3
Atlassian Confluence Server versions 6.15.0 to 6.15.5

Exploitation Mechanism

Attackers can exploit the vulnerability by uploading a malicious attachment that manipulates the

mimeType

parameter.

Mitigation and Prevention

Protecting systems from CVE-2019-20102 requires immediate actions and long-term security practices.

Immediate Steps to Take

Update Atlassian Confluence Server to a patched version
Monitor and restrict attachment uploads
Educate users on safe attachment handling

Long-Term Security Practices

Regularly update and patch software to address security vulnerabilities
Implement content security policies to prevent XSS attacks

Patching and Updates

Apply the latest security patches provided by Atlassian
Stay informed about security advisories and updates from Atlassian