CVE-2021-24874 : Exploit Details and Defense Strategies
Discover the impact of CVE-2021-24874 found in Newsletter, SMTP, Email marketing, and Subscribe forms by Sendinblue plugin < 3.1.31. Learn about mitigation strategies and how to prevent XSS attacks.
A detailed analysis of CVE-2021-24874, a vulnerability found in the Newsletter, SMTP, Email marketing, and Subscribe forms by Sendinblue WordPress plugin before version 3.1.31 that leads to Reflected Cross-Site Scripting (XSS) issues.
Understanding CVE-2021-24874
This section will cover what CVE-2021-24874 is, its impact, technical details, and mitigation strategies.
What is CVE-2021-24874?
The Newsletter, SMTP, Email marketing, and Subscribe forms by Sendinblue WordPress plugin before version 3.1.31 fails to escape the lang and pid parameters, resulting in Reflected Cross-Site Scripting vulnerabilities.
The Impact of CVE-2021-24874
The vulnerability allows attackers to execute malicious scripts in users' browsers through crafted links, potentially leading to unauthorized data disclosure or account hijacking.
Technical Details of CVE-2021-24874
This section will delve into the specifics of the vulnerability, including its description, affected systems, and exploitation mechanisms.
Vulnerability Description
The issue arises from the plugin's failure to properly sanitize user-supplied inputs, enabling attackers to inject malicious scripts into web pages viewed by other users.
Affected Systems and Versions
The vulnerability affects versions of the Newsletter, SMTP, Email marketing, and Subscribe forms by Sendinblue plugin prior to version 3.1.31.
Exploitation Mechanism
Attackers can exploit this vulnerability by enticing victims to click on specially crafted links or forms, leading to the execution of arbitrary code in the context of the user's session.
Mitigation and Prevention
Here, we will discuss the immediate steps to take and best practices for long-term security to mitigate the risks associated with CVE-2021-24874.
Immediate Steps to Take
Website administrators should urgently update the affected plugin to version 3.1.31 or higher to eliminate the vulnerability.
Long-Term Security Practices
Implement input validation and output encoding mechanisms to prevent XSS attacks on your WordPress site and regularly monitor for security updates.
Patching and Updates
Stay informed about security best practices and promptly apply patches and updates to all WordPress plugins to safeguard against emerging threats.