CVE-2021-24638 : Security Advisory and Response

The OMGF WordPress plugin before version 4.5.4 is affected by an unauthenticated path traversal vulnerability in the REST API, potentially allowing malicious users to overwrite CSS files with Google Fonts CSS or download fonts from the Google Fonts website.

Understanding CVE-2021-24638

This vulnerability impacts the OMGF WordPress plugin, specifically versions prior to 4.5.4, and can be exploited by unauthenticated users.

What is CVE-2021-24638?

The CVE-2021-24638 vulnerability in the OMGF WordPress plugin arises from the lack of proper handling or validation of the handle parameter in the REST API. This oversight enables unauthenticated individuals to manipulate paths and perform unauthorized actions on CSS files or fonts.

The Impact of CVE-2021-24638

Exploitation of this vulnerability can result in unauthorized modifications to CSS files used on websites, potentially leading to malicious content injection or the unauthorized download of fonts from Google Fonts.

Technical Details of CVE-2021-24638

The technical aspects of CVE-2021-24638 include vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The flaw in the OMGF WordPress plugin allows unauthenticated users to conduct path traversal attacks through the REST API, posing a risk of overwriting CSS files or extracting fonts from Google Fonts.

Affected Systems and Versions

Versions of the OMGF WordPress plugin preceding 4.5.4 are vulnerable to this unauthenticated path traversal issue, putting websites at risk of unauthorized file manipulation.

Exploitation Mechanism

By manipulating the handle parameter in the REST API, attackers can bypass security controls and gain unauthorized access to CSS files, potentially leading to a compromise of website integrity.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-24638, immediate actions along with long-term security practices are advised.

Immediate Steps to Take

Website administrators should update the OMGF plugin to version 4.5.4 or higher to eliminate the vulnerability. Additionally, monitoring for any unauthorized file changes is recommended.

Long-Term Security Practices

Implementing regular security assessments, staying informed about plugin updates, and ensuring proper input validation can help prevent similar vulnerabilities in the future.

Patching and Updates

Regularly applying security patches and keeping all software components, including plugins, up to date can prevent attackers from exploiting known vulnerabilities.