CVE-2021-24897 : Vulnerability Insights and Analysis

A stored Cross-Site Scripting (XSS) vulnerability was discovered in the Add Subtitle WordPress plugin version 1.1.0 and below, allowing attackers with contributor-level access to execute malicious scripts.

Understanding CVE-2021-24897

This CVE describes a security issue in the Add Subtitle WordPress plugin that could be exploited to perform XSS attacks.

What is CVE-2021-24897?

The Add Subtitle WordPress plugin version 1.1.0 and below fails to properly sanitize input, enabling users with contributor roles to inject and execute malicious scripts through the sub-title field.

The Impact of CVE-2021-24897

This vulnerability could be exploited by low-privileged users to inject harmful scripts into the plugin's output on web pages, potentially leading to unauthorized actions, data theft, or site defacement.

Technical Details of CVE-2021-24897

The technical details of this CVE cover the vulnerability description, affected systems and versions, and the exploitation mechanism.

Vulnerability Description

The Add Subtitle plugin up to version 1.1.0 lacks proper input sanitization, allowing contributors to insert malicious scripts using the sub-title feature.

Affected Systems and Versions

Versions up to and including 1.1.0 of the Add Subtitle plugin are impacted by this vulnerability, which primarily affects websites utilizing the classic editor.

Exploitation Mechanism

By leveraging the lack of input validation, attackers with contributor access can insert and execute XSS payloads via the sub-title function, posing a risk to website integrity and user security.

Mitigation and Prevention

Addressing CVE-2021-24897 requires immediate action to secure affected systems and implement long-term security measures.

Immediate Steps to Take

Website administrators should deactivate or update the Add Subtitle plugin to a patched version to mitigate the risk of XSS attacks. Implementing web application firewalls and security plugins can also help prevent script injections.

Long-Term Security Practices

Regularly monitor for plugin updates and security advisories. Educate users with elevated roles on safe content creation practices to minimize the risk of XSS vulnerabilities.

Patching and Updates

Developers of the Add Subtitle plugin have released a fix for this vulnerability. Ensure systems are updated to the latest patched version to protect against potential XSS exploits.