CVE-2021-25074 : Exploit Details and Defense Strategies

WebP Converter for Media plugin before version 4.0.3 in WordPress is vulnerable to an Unauthenticated Open Redirect issue due to insufficient validation of the 'src' parameter in the 'passthru.php' file. This could lead to malicious redirects.

Understanding CVE-2021-25074

This CVE highlights a security vulnerability in the WebP Converter for Media plugin, affecting versions prior to 4.0.3, allowing an attacker to perform Open Redirect attacks.

What is CVE-2021-25074?

The CVE-2021-25074 vulnerability is categorized under CWE-601, indicating an 'Open Redirect' issue where the plugin fails to validate the 'src' parameter, exposing users to potential malicious redirection to untrusted sites.

The Impact of CVE-2021-25074

Exploiting this vulnerability can result in attackers tricking users into visiting malicious websites, leading to phishing attacks, malware infections, or unauthorized data access.

Technical Details of CVE-2021-25074

The following technical aspects shed light on the nature of the vulnerability.

Vulnerability Description

The vulnerability lies in the 'passthru.php' file of WebP Converter for Media WordPress plugin, where inadequate validation of the 'src' parameter allows unauthorized users to redirect victims to malicious sites.

Affected Systems and Versions

WebP Converter for Media versions earlier than 4.0.3 are impacted by this vulnerability, making websites using these versions susceptible to Open Redirect attacks.

Exploitation Mechanism

By manipulating the 'src' parameter in the 'passthru.php' file, threat actors can craft URLs to redirect users to malicious domains, exploiting their trust in the affected plugin.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-25074, it is crucial to undertake immediate actions and implement long-term security measures.

Immediate Steps to Take

Website administrators should update the WebP Converter for Media plugin to version 4.0.3 or higher to patch the vulnerability and prevent Open Redirect attacks.

Long-Term Security Practices

Regularly monitor security advisories, conduct security assessments, and educate users about the risks of interacting with unverified links to enhance overall security posture.

Patching and Updates

Ensuring timely installation of security patches and updates for all plugins and software components is essential to eliminate known vulnerabilities and enhance the resilience of the website against potential exploits.