CVE-2020-20781 Explained : Impact and Mitigation

A stored cross-site scripting (XSS) vulnerability in UCMS 1.4.7 allows attackers to execute arbitrary web scripts or HTML via crafted payloads in specific fields.

Understanding CVE-2020-20781

What is CVE-2020-20781?

This CVE refers to a stored cross-site scripting (XSS) vulnerability found in UCMS 1.4.7, enabling attackers to run malicious scripts through manipulated input.

The Impact of CVE-2020-20781

The vulnerability allows threat actors to execute arbitrary web scripts or HTML, posing a risk of unauthorized data access, manipulation, or defacement.

Technical Details of CVE-2020-20781

Vulnerability Description

The flaw exists in /ucms/index.php?do=list_edit of UCMS 1.4.7, permitting attackers to inject malicious scripts via fields like title, keywords, description, or content.

Affected Systems and Versions

Product: UCMS
Vendor: n/a
Version: 1.4.7

Exploitation Mechanism

Attackers can exploit this vulnerability by inserting a crafted payload into the vulnerable fields, leading to the execution of unauthorized scripts.

Mitigation and Prevention

Immediate Steps to Take

Implement input validation to sanitize user inputs effectively.
Regularly monitor and audit user-generated content for suspicious scripts.

Long-Term Security Practices

Conduct security training for developers to enhance awareness of secure coding practices.
Employ web application firewalls (WAFs) to filter and block malicious traffic.

Patching and Updates

Apply patches or updates provided by UCMS promptly to address the vulnerability.