CVE-2021-38357 : Vulnerability Insights and Analysis

SMS OVH <= 0.1 Reflected Cross-Site Scripting vulnerability allows attackers to inject arbitrary web scripts via the position parameter in the ~/sms-ovh-sent.php file.

Understanding CVE-2021-38357

This CVE refers to a vulnerability in the SMS OVH WordPress plugin that enables Reflected Cross-Site Scripting, affecting versions up to and including 0.1.

What is CVE-2021-38357?

The vulnerability in the SMS OVH WordPress plugin permits attackers to execute Reflected Cross-Site Scripting attacks by manipulating the position parameter within the ~/sms-ovh-sent.php file.

The Impact of CVE-2021-38357

The impact of this vulnerability is considered to be of medium severity, with a CVSS base score of 6.1. It poses a risk of injecting arbitrary web scripts, potentially leading to unauthorized access or data theft.

Technical Details of CVE-2021-38357

This section delves into the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability arises from improper validation of user-supplied data in the position parameter, enabling attackers to embed malicious scripts into web pages viewed by other users.

Affected Systems and Versions

The SMS OVH WordPress plugin versions up to and including 0.1 are impacted by this CVE, exposing websites to Reflected Cross-Site Scripting attacks.

Exploitation Mechanism

Attackers can exploit this vulnerability by crafting malicious links or sending phishing emails containing the manipulated position parameter, leading to script execution in the context of unsuspecting users.

Mitigation and Prevention

Protect your WordPress site from CVE-2021-38357 with the following measures.

Immediate Steps to Take

Uninstall the SMS OVH plugin immediately if you are using a vulnerable version.
Monitor your site for any suspicious activities or unauthorized changes.

Long-Term Security Practices

Regularly update all plugins and themes to the latest versions to patch known vulnerabilities.
Educate users on safe browsing practices, especially in avoiding clicking on untrusted links.

Patching and Updates

Stay informed about security advisories and patches released by plugin developers. Apply updates promptly to safeguard your WordPress site.