CVE-2020-21353 : Security Advisory and Response

A stored cross-site scripting (XSS) vulnerability in GetSimple CMS 3.4.0a allows attackers to execute arbitrary web scripts or HTML via crafted payload in the Edit Snippets module.

Understanding CVE-2020-21353

This CVE involves a stored XSS vulnerability in GetSimple CMS 3.4.0a, enabling attackers to run malicious scripts through specially crafted payloads.

What is CVE-2020-21353?

This CVE identifies a stored cross-site scripting vulnerability in the /admin/snippets.php of GetSimple CMS 3.4.0a, which can be exploited by attackers to execute arbitrary web scripts or HTML.

The Impact of CVE-2020-21353

The vulnerability allows attackers to inject malicious scripts or HTML code, potentially leading to unauthorized access, data theft, or other security breaches.

Technical Details of CVE-2020-21353

Vulnerability Description

A stored cross-site scripting (XSS) vulnerability in /admin/snippets.php of GetSimple CMS 3.4.0a allows attackers to execute arbitrary web scripts or HTML via crafted payload in the Edit Snippets module.

Affected Systems and Versions

Product: GetSimple CMS
Version: 3.4.0a

Exploitation Mechanism

Attackers can exploit this vulnerability by injecting specially crafted payloads into the Edit Snippets module, enabling the execution of malicious scripts or HTML.

Mitigation and Prevention

Immediate Steps to Take

Update GetSimple CMS to the latest version to patch the vulnerability.
Regularly monitor and sanitize user inputs to prevent XSS attacks.

Long-Term Security Practices

Implement input validation and output encoding to mitigate XSS risks.
Conduct security audits and penetration testing to identify and address vulnerabilities.

Patching and Updates

Apply security patches promptly to address known vulnerabilities and enhance system security.