CVE-2020-29456 Explained : Impact and Mitigation

Papermerge before 1.5.2 is affected by multiple cross-site scripting (XSS) vulnerabilities that allow remote attackers to inject arbitrary web script or HTML via various functions.

Understanding CVE-2020-29456

Papermerge before version 1.5.2 is susceptible to XSS attacks, enabling malicious actors to inject harmful scripts into the application.

What is CVE-2020-29456?

Multiple XSS vulnerabilities in Papermerge before 1.5.2
Attackers can inject malicious web scripts or HTML through functions like rename, tag, upload, or create folder
Payload can be inserted in a folder, tag, or document's filename
If email consumption is configured, a malicious document can be sent via email and automatically uploaded without authentication

The Impact of CVE-2020-29456

Remote attackers can exploit XSS vulnerabilities to execute arbitrary scripts or HTML
No authentication required for exploitation if email consumption is configured

Technical Details of CVE-2020-29456

Papermerge CVE details and technical aspects.

Vulnerability Description

Cross-site scripting (XSS) vulnerabilities in Papermerge before 1.5.2
Allows injection of arbitrary web script or HTML

Affected Systems and Versions

Papermerge versions before 1.5.2

Exploitation Mechanism

Attackers inject malicious scripts via functions like rename, tag, upload, or create folder
Payload can be in various parts of the application

Mitigation and Prevention

Protecting against CVE-2020-29456.

Immediate Steps to Take

Update Papermerge to version 1.5.2 or later
Disable email consumption if not required
Regularly monitor for suspicious activities

Long-Term Security Practices

Implement input validation to prevent XSS attacks
Conduct security audits and penetration testing

Patching and Updates

Apply patches and updates promptly
Stay informed about security advisories and best practices