CVE-2021-42549 : Exploit Details and Defense Strategies
CVE-2021-42549 involves a reflected XSS vulnerability in WordPress plugin Lets-Box by WP Cloud Plugins before 1.15.3, allowing unauthenticated users to execute malicious scripts.
WordPress plugin Lets-Box by WP Cloud Plugins before version 1.15.3 is affected by a reflected Cross-Site Scripting (XSS) vulnerability.
Understanding CVE-2021-42549
This CVE involves an insufficient Input Validation issue in the search functionality of Lets-Box plugin, allowing an unauthenticated user to execute a reflected XSS attack.
What is CVE-2021-42549?
CVE-2021-42549 is a medium-severity vulnerability that stems from inadequate input validation in the Lets-Box plugin for Wordpress, enabling unauthenticated users to carry out a reflected XSS attack.
The Impact of CVE-2021-42549
The vulnerability's impact is rated as medium severity, with a CVSS base score of 4.7. It could be exploited by an attacker to manipulate search functionality and execute malicious scripts in the context of an unsuspecting user's browser.
Technical Details of CVE-2021-42549
This section covers specific technical details of the vulnerability.
Vulnerability Description
The vulnerability exists due to insufficient input validation in the search feature of Lets-Box plugin, potentially enabling malicious user input to trigger a reflected XSS.
Affected Systems and Versions
- Product: Lets-Box by WP Cloud Plugins
- Versions Affected: All versions prior to 1.15.3
- Affected Version Type: Custom
Exploitation Mechanism
The attacker can craft a URL containing malicious script tags, which when clicked by a user, execute on the affected webpage.
Mitigation and Prevention
Protect your systems and users from CVE-2021-42549 with the following steps:
Immediate Steps to Take
- Update Lets-Box plugin to version 1.15.3 or later.
- Consider limiting access to the search functionality until the patch is applied.
Long-Term Security Practices
- Regularly monitor and update plugins to avoid potential security loopholes.
- Educate users about the risks of clicking on untrusted links.
Patching and Updates
Ensure the Lets-Box plugin is regularly updated to the latest secure versions to mitigate the risk of XSS vulnerabilities.