CVE-2021-24908 : Security Advisory and Response

The Check & Log Email WordPress plugin before version 1.0.4 is vulnerable to Reflected Cross-Site Scripting due to improper handling of user input, allowing attackers to execute malicious scripts in the context of a victim's browser.

Understanding CVE-2021-24908

This CVE relates to a security issue in the Check & Log Email WordPress plugin version 1.0.4 and below, which could be exploited by attackers to conduct XSS attacks.

What is CVE-2021-24908?

The Check & Log Email WordPress plugin version 1.0.4 and earlier fail to properly sanitize user-supplied data, leading to a Reflected Cross-Site Scripting vulnerability. This allows malicious users to inject client-side scripts into web pages viewed by other users.

The Impact of CVE-2021-24908

The lack of input validation in Check & Log Email plugin versions prior to 1.0.4 opens the door for attackers to execute arbitrary code in users' browsers, potentially leading to the theft of sensitive information or unauthorized actions.

Technical Details of CVE-2021-24908

This section dives deeper into the vulnerability specifics to help users understand the severity and implications of CVE-2021-24908.

Vulnerability Description

The security flaw in Check & Log Email version 1.0.4 and earlier stems from the plugin's failure to properly escape the 'd' parameter before rendering it back in an attribute, facilitating XSS attacks.

Affected Systems and Versions

Check & Log Email versions less than 1.0.4 are confirmed to be impacted by this vulnerability.

Exploitation Mechanism

By enticing a victim to click on a specially crafted link containing the malicious script, an attacker can leverage the XSS vulnerability to execute arbitrary code within the victim's session.

Mitigation and Prevention

To protect systems and users from potential exploitation of CVE-2021-24908, immediate actions and long-term security practices are recommended.

Immediate Steps to Take

Update Check & Log Email WordPress plugin to version 1.0.4 or newer to patch the XSS vulnerability.
Monitor website logs and user inputs for any suspicious activities.

Long-Term Security Practices

Educate website administrators and users about the risks of XSS attacks and how to identify potential threats.
Regularly audit and update plugins and software to address security vulnerabilities promptly.

Patching and Updates

Stay informed about security patches and updates for all installed WordPress plugins to ensure timely mitigation of known vulnerabilities.