CVE-2021-24147 : Vulnerability Insights and Analysis
Discover how CVE-2021-24147 affects the Modern Events Calendar Lite plugin before 5.16.5. Learn the impact, technical details, and mitigation steps for this XSS vulnerability.
Modern Events Calendar Lite plugin before version 5.16.5 in WordPress is vulnerable to Authenticated Stored Cross-Site Scripting (XSS) due to unvalidated input. An attacker with as low privilege as author can inject malicious scripts into event notes, leading to XSS when viewing the event.
Understanding CVE-2021-24147
This CVE identifies a security flaw in the Modern Events Calendar Lite WordPress plugin that allows authenticated users to perform cross-site scripting attacks.
What is CVE-2021-24147?
The vulnerability in versions prior to 5.16.5 of the Modern Events Calendar Lite plugin enables users with minimal privileges to insert harmful XSS payloads in event notes.
The Impact of CVE-2021-24147
This vulnerability can be exploited by attackers to execute arbitrary scripts in the context of an authenticated user's session, potentially leading to unauthorized actions or data theft.
Technical Details of CVE-2021-24147
The following details provide a deeper insight into the vulnerability.
Vulnerability Description
Unvalidated input in the mic_comment field of event notes allows for XSS payloads, which are executed when viewing the event on the frontend.
Affected Systems and Versions
Modern Events Calendar Lite versions prior to 5.16.5 are impacted by this XSS vulnerability.
Exploitation Mechanism
Attackers, with as low privileges as authors, can leverage the vulnerability to insert malicious scripts within event notes, which get executed when the event is viewed.
Mitigation and Prevention
To safeguard your system against CVE-2021-24147, certain precautionary measures need to be taken.
Immediate Steps to Take
Ensure to update the Modern Events Calendar Lite plugin to version 5.16.5 or higher to mitigate the risk of XSS attacks.
Long-Term Security Practices
Regularly monitor security advisories and update your plugins promptly to prevent known vulnerabilities from being exploited.
Patching and Updates
Stay informed about security patches and updates released by plugin developers to address security vulnerabilities like CVE-2021-24147 effectively.