CVE-2020-21038 : Security Advisory and Response

This CVE record discusses an open redirect vulnerability in Typecho 1.1-17.10.30-release via the referer parameter to Login.php.

Understanding CVE-2020-21038

This CVE-2020-21038 entry highlights a specific security issue in Typecho 1.1-17.10.30-release related to open redirect vulnerability.

What is CVE-2020-21038?

The CVE-2020-21038 vulnerability involves a security flaw in Typecho 1.1-17.10.30-release that allows attackers to redirect users to malicious websites via the referer parameter in Login.php.

The Impact of CVE-2020-21038

This vulnerability can be exploited by malicious actors to trick users into visiting phishing sites or downloading malware, potentially leading to unauthorized access to sensitive information.

Technical Details of CVE-2020-21038

This section delves into the technical aspects of the CVE-2020-21038 vulnerability.

Vulnerability Description

The open redirect vulnerability in Typecho 1.1-17.10.30-release enables attackers to manipulate the referer parameter in Login.php to redirect users to malicious websites.

Affected Systems and Versions

Vendor: n/a
Product: n/a
Versions: All versions are affected.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting a malicious URL containing the manipulated referer parameter, leading users to unintended websites.

Mitigation and Prevention

To address CVE-2020-21038, follow these mitigation strategies:

Immediate Steps to Take

Disable the referer parameter in Login.php to prevent redirection attacks.
Educate users about the risks of clicking on unknown links.

Long-Term Security Practices

Regularly update Typecho to the latest version to patch known vulnerabilities.
Implement URL validation mechanisms to detect and block malicious redirects.

Patching and Updates

Apply security patches provided by Typecho to fix the open redirect vulnerability and enhance overall system security.